I actually just started something just like this a couple of months ago. I can tell you my experience so far. Of course, it has only been two months so that should be taken into consideration.
I bootstrapped a full service platform targeting small to medium sized churches. I offer a website (based on WordPress themes), hosting, email addresses, cloud storage, managed updates, etc. etc. Basically, my goal is to take out every possible technological hang up that could occur when trying to manage or set up a website.
First off, I found a large majority of companies that offer a website service similar to what I offer and I looked at exactly what they offer and for what price. I also looked at what each of their themes/websites offered in terms of features. I then set out to make a platform that is better in every way. I don't want to sound arrogant or prideful, but as far as numbers are concerned I believe I have accomplished that goal.
Once I was confident I could provide an equal or better service than other businesses, I started building out my platform. I launched around the end of February and as everyone knows, users don't magically appear out of thin air. Since I launched, I have been doing everything I can to draw in potential customers. I will go ahead and list some of the things I have done.
I have personally contacted church/ministry related bloggers to see if they would review the product/tweet/or let me write a guest blog post about technology in the church or any other topic.
I found about 40 local churches that don't have a website or have a really old website and emailed them explaining what I offer.
I bought ads on several church/ministry related blogs.
Two months in and how have my efforts paid off so far? After contacting about 20 bloggers, I got a one guest post that resulted in 17 visitors to my site and a tweet from someone with about 100K twitter followers. That got me a few twitter followers and probably about 100 visits to my site. Out of all of the churches I have emailed, I have yet to receive one reply back. For the ads I purchased, I have received about 75 clicks with a 0.20% click through rate. As far as people sending me email questions through my contact form, I have received about 3-5 emails from different people.
Keep in mind I have only been going for about two months but so far I have zero paying customers. I am definitely still hopeful and curious to see how things turn out, but I didn't quite expect the result I have gotten so far. I do offer a free plan and I have had several people sign up for the free plan but no income yet. It's ironic because, on paper, it seems like I have done most things right. I know the niche, I know there is a need for my service, I have contacted local potential customers, etc. etc. The only problem is, I don't really have any results to show for it. Essentially, building out the product was infinitely easier than marketing/customer acquisition :) You also have to take into account the certain niche I am targeting. I am almost positive I would have different results if i was targeting something like dentists. Those different results might be a lower number of visits or they might be a large number of subscribers…I have no idea. Either way, my advice is to spend as much time as possible researching your potential niche, try to spend as little money as possible while still making a great product and remember, if someone tells you they would be interested in paying for your product their word means nothing until you have their credit card number. Most importantly, it's important to understand that the hard part starts after you launch.
P.S. If anyone would like to jump on board to help out with the marketing/customer acquisition side of things shoot me an email!