Ive been asked numerous times by folks if I could act as their GC for build-to-rent/build-to-sell properties.- How would this work from a lending perspective?

What happens if you need or want to refi or even sell?

I have a friend/neighbor that wants to sell me his house below market value so he can move back into an apartment and travel.

What are you trying to sell?

Either pay it back in ten years or when I sell I have to give a % of the equity to the lending company. breakdown$2,200-$1,100=$1,000 profit what are your thoughts?  

I've heard/had good results with more targeted driving for dollars looking for distress, or to some other comments points here, look for other data points to isolate "needs" to sell rather than "wants".

This gets people burned too many times by getting comps from a wholesaler, believing the comps, and then trying to sell it at that outprice that the wholesaler/bad agent gave is a huge miscalculation.

This means the rental rates are average nothing to write home about, but the increase you'll get in appreciation is amazing, but not liquid until you sell. 

I figure never sell the cow when you can get the milk for free)

Probably better to post in the Buying & Selling Real Estate Forum.Without details, hard to answer the question.