I was presented to these deals, I deleted the address just for privacy purposes but I spot checked in zillow, the estimate value of these houses are in the ballpark. 

My present one was referred by a contractor who gets all his work from them, and it was a mistake from the start.

This is not a good business practice and would have avoided your present situation.

The other way I know of is they will reimburse the funds you spend from a pool of available renovation cash when you present them with receipts for work done.

Present contract and disclosures to investor? 

If you stay to the end of the meet up there is a lot of chance to talk with the investor and get your questions answered with a smaller group than are present earlier in the Meet up when there may be 30 or 40 people there.The Meetups have ranged from flips of SFH, to flip of a SFR that will be sold as a SFR but the buyer will be renting it as a duplex (included tricks of the trade to work around the SFR zoning), to a quad that is a buy n hold where each unit can use some rehab, to a purchase of empty lot and building 3 new SFRs.

Additional your equity is costing you $2200/month in lost income based on a opportunity value of 10% (assuming present mortgages at 5%).

Some are BK with good payment records at present presumably because the trustee is making the payments, the majority of others have been sporadic payers.As an example, I see a note with a low UPB of approx $15,000 payoff with a low LTV of approx 25% at a rate of approx 14% that is in a rural area. 

They are presented in an educational format and each one is like a short course on different strategies used by the guests.Start learning your market.  

Make sure it's all documented so you can present a case to the board if you need to appeal and rule violations.