But in my opinion it starts with the site conditions and foundation to ensure that any kind of work you're gonna do will stand the test of time/nature. 

However, there are a few things you should keep in mind.Most of these platforms require that you be an accredited investor in order to invest in their real estate syndication offerings.

The things that help you stand out are (in no order and not just these items) Location, amenities of the community, size of the community (can it handle the traffic), reputation of community, how well the house is themed (or can be by you).You need to be in a highly amenitized communtiy like Championsgate, Windsor Island, Soterra and several others.

If I can't find that the house was converted pre-1990 so that it is legal non-conforming, do I have a leg to stand on?

Hello everyone, My name is Austin Charlton. I'm very glad to be apart of this community.
Austin Charlton 

Can't wait to learn more on the platform. 

Welcome Myia D. a few weeks ago and completely stand behind what he has too say.

I would check on FB Marketplace (although I loathe that platform) and CL for comps in your area.Regarding the basement, you may find it hard to enforce the "no storage" rule if they have access. 

Run background checks on a platform like Smartmove (by Transunion)5.)

that discusses their results using the different platforms like AIRBNB, FF VRBO & Sabbatical Homes.