I suggest you look into commercial lending, to learn about it before you require it, and start looking for people in the lending space who can assist you as you move forward and with whom you can develop relationships.You now have mad skills and experience doing the whole demo and rebuild, and if you can repeat a few times, your one deal enables you to add a couple others.  

:Class A Properties:Cashflow vs Appreciation: Typically, 3-5 years for positive cashflow, but you get highest relative rent & value appreciation.Vacancy Est: Historically 10%, 5% the more recent norm.Tenant Pool: Majority will have FICO scores of 680+ (roughly 5% probability of default), zero evictions in last 7 years.Class B Properties:Cashflow vs Appreciation: Typically, decent amount of relative rent & value appreciation.Vacancy Est: Historically 10%, 5% should be applied only if proper research done to support.Tenant Pool: Majority will have FICO scores of 620-680 (around 10% probability of default), some blemishes, but should have no evictions in last 5 yearsClass C Properties:Cashflow vs Appreciation: Typically, high cashflow and at the lower end of relative rent & value appreciation.

You don't need to know everything to get started; you need a foundation to build on, and the rest will come through experience and then refining your education.You can build a basic understanding of investing in 3-6 months.

From my experience, many owners in co-ops with similar rules are able to get around the rental restrictions.

Yes - it is more responsibility & work -  but by having all the control you not only get more experience, but control your own destiny, versus being a rider on the bus as a LP.  

I know this because years ago as an experiment I had posted my condo for sale as a FSBO.

Work with him/her and get some experience before you try it on your own.

Check out FilePlace, where user-created forms are available for free.

Does anyone have investing experience/successes/advice on what is doing well there?

If you don't need some of these more esoteric features, you might end up with something different than what I chose.