My wife and I have a setup up in our house (it's all GRAS and Biosafety Level 1 stuff) and have mostly bought off ebay and govdeals. She's a neuroscientist and I'm a physics/engineering guy. My job is to handle the business end, acquire gear, and maintain it so that she can science as hard as possible.
Most of our lab gear is 80s and 90s-vintage gear we've fixed up. You'd be amazed what a little analogue electronics knowledge can do here; people will throw out a device rather than replace the belts or motor brushes. We'll get used and broken gear at a fraction of of the cost of new and certified refurb machinery.
I'm currently modding our venerable Labline orbital shaker incubator. Over the course to two months the tachometer and both of the remote bulb thermostats on it went out, so I'm installing a Johnson Controls A421 to manage the heater and adding a $20 Hall effect tachometer to replace the analog tach. The mechanicals are solid, though (got it for $300 plus freight!) and getting another would be a slow expensive crap shoot.
BTW, readers, do you think that there is an audience for a blog that talks about the details of rebuilding old equipment like this? I'm not big on video, so it would mostly be long form writing with lots of images.
But if your goal is to eventually scale up and build a production lab, you will need to switch your mindset when you get some funding and buy some decent equipment. It can make a big difference from my experience. My company started out at a sub-par lab space with second hand equipment. When we moved to a very well equipped lab, we found ourselves exponentially more productive. Mainly because we no longer have to constantly second-guessing our results due to sub-optimal equipment/reagents. Re-running experiments because of potential equipment failure adds up in terms of resources and psychological stress.
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> BTW, readers, do you think that there is an audience for a blog that talks about the details of rebuilding old equipment like this? I'm not big on video, so it would mostly be long form writing with lots of images
I see a business spin: sell shovels for the upcoming biotech boom. Get equipment on the cheap, fix it, reseller it with a warranty.