It seems these inevitably run into problems as the investment projections are not met, loses begin to pile up, SEC compliance issues are ignored, and numerous legal actions are instituted against the sponsor.   

I've seen numerous newer investors come to us for help after they've purchased a flip property in need of a massive rehab that did not know about the "FEMA 50%" rule.

Rode my bike around the area numerous times. 

San Antonio offers numerous opportunities, particularly for fix-and-flip projects and rentals.

I am a real estate agent who toured numerous homes on driftwood.

Then, with reasonable confidence you can estimate costs.I personally don't love the square foot estimating method for remodeling as I think it is an easy way to lose.

Or would you suggest other methods to gather data and insights before committing to a subscription?

BUT I still understand the point that most people made, these are not concrete/stick built structures with conventional building methods, and it is owner/operator, and it's a volatile industry, and its 50min from the Gatlinburg hotspot, and the main house is a double wide, etc.I guess my dream would be that an owner that wants to live and work in one place can buy this property, live in the main house and self manage the property.

Nonetheless, I agree... with your mortgage rate being so low, it seems like it makes sense to access the equity via other methods beyond refinancing. 

Quote from @Renee Pohle: Please talk to an attorney and create a strong partnership agreement that includes a method for parting ways.