Extra salt to wound: and what kind of profit/revenue/result is it going to generate other than the fact that it consumes power? The more I look back at the maker movement, the more it looks a structurally self extinguishing fire.
Other cities are doing better. Usually because of government support. "We need to retrain workers" arguments play well in industrial cities.
The original Menlo Park TechShop had skilled people doing hard stuff. People making things for the X-prize. People from Stanford who needed more machine tools than Stanford had. People from startups. Gradually that declined. Stanford and Google got their own in-house shops. Then there was the "Etsy crap" era - people using CNC laser cutters to make "hand made" stuff to sell on Etsy. At peak, TechShop SF had eight laser cutters going almost constantly. That died when Etsy removed the requirement that you make it yourself.
Today, maker spaces seem to be mostly learning centers for teenagers. The "STEM" or "STEAM" thing. That's fine, but it's a branch of the college prep industry.
Farther out but an awesome space and a bit less intimidating is Hacker Lab in Sacramento https://hackerlab.org/
We've had more than a few Tech Shop refugees over the past few months/years. Noisebridge is great, and both of our spaces definitely have unique feels and great communities built around them.
I wandered into the space some 5 years ago and what stood out to me echos what above commenters have said - there is a definite air of don't-buy-what-you-can-build or repair within the maker sphere that spoke to me.
While there are plenty of edu institutions and private industry shops out there that have all the equipment we do and more, the community here of folks from different experience levels, background, etc. really makes makerspaces unique.
When Hacker Lab showed up there were only a small handful of coworking spaces in the area. 7 years later, I can't throw a stick without hitting one. I feel part of our survival has been going for breadth - coworking, hackathons, and makeing can all benefit from eachother.
That said, I'm as anxious and unknowing to see where this maker thing goes as the next person.
NYC has two larger places I know of that basically follow this model. One is subsidized by a community college and is aimed more at professionals (companies, artists, etc.). The other opened a new location (took over afaik the techshop location that lasted a whole week) in a heavily government subsidized building.
Especially in cities with mostly apartments, traditional wood and metalworking hobbies are infeasbile due to the size of the tools. It's also inefficient to own them individually if you're using them 3 hours a week.
Make sure the maker space has everything your high school shop class did, market it that way, and you draw in an entirely new demographic to keep the site vibrant and fiscally healthy. There's plenty of opportunity for cross-pollination-- I could imagine someone coming in to use conventional power tools being apprenticed into using CNC equipment or 3D printing to achieve the same objectives, or the electronics enthusiasts pairing up with the metalworkers for custom panels and cases.
In addition, there's an interesting phenomenon in the maker community that a lot of people think IP (models, designs, plans, etc.) should pretty much be given away for free, which limits revenue opportunities.
[Edit to add info in case anyone comes across this in the future]: The #1 issue is actually rent in a lot of cases. There's a conundrum where the people who most want to use a maker space are the same people who want a maker space in a place with high rent (i.e. in a desirable urban area). On the flip side, people who have their own garage / shed / yard are generally much less in need of a maker space (which would be in a cheaper area to serve them) since entry-level prices for most tools have gotten pretty cheap in recent years.
Next is labor cost. If you're not paying yourself a decent salary for your time, you're basically cheating yourself into thinking your maker space isn't losing money. Realistic labor cost should run you at least double prevailing minimum wage in the area for the hours you're open, probably more if you're counting on people to help students with things like CNC machining.
Next up is tools & repairs cost. You can actually get decent tools going for less than you would think if you don't splurge for name brand everything (especially printers, CNC mills, laser cutters, etc.), but if you're open to the public, the public is going to break your stuff. A lot. And you're going to have to fix it or pay someone to fix it. A lot.
Then there's all the ancillary stuff like electricity (likely to cost more than you think), insurance, accounting, payment processing, marketing, etc. etc. Basically, if you want your maker space to make money like a business you have to treat it like a business and that means a lot of overhead.
In short, I don't recommend anyone start a maker space with delusions that it will make money. It probably won't. Only start a maker space if you and a bunch of your friends are all willing to pitch in every month to have a cool place to hang out and work on stuff.
These are the people who also have enough money to actually spend on "doing stuff", but for whom going to a "dedicated space" (away from the home/family) to do it can be a huge inconvenience.
Contrast that with maker focused businesses like Sparkfun and Adafruit.
I don’t see cities investing the hundreds of thousands of dollars it would take to build out a maker space, not to mention the money to staff it, run the training courses, maintain the equipment and pay for the insurance.
A few examples: https://library.pflugervilletx.gov/services/pfab-lab, https://www.chipublib.org/maker-lab/, https://ignite.hepl.lib.in.us/, https://www.jocolibrary.org/makerspace
I’ve also considered starting a community makerspace in the west end of town, a coop or some sort of publicly funded model. This comment section is a good reminder that we had better have a solid operations plan in place for it to be a success.