Michael, we represent buyer investors here in Nashville.

The buyer then decided to use a private lender that had also failed to get him the funds to close on time. 

It doesn't not impact buyers as much from a tax perspective as it does the seller. 

If there is a house with a detached ADU, if the main house was built prior to 1978, it is subject to rent control.A buyer can attempt the Ellis Act, which could take months (owner occupied loans generally require the borrower to move in within 60 days) and cost $20,000+.

Flipping is not a great option right now if you aren't experienced because regular home buyers are buying a lot of the dumps and overpaying, spinning the market for trash homes up too high to make any money flipping.

I'm wondering though...if you buy a new constructon, will builders still pay for a buyer's agent fee?

A new loan officer or one not familiar with DSCR might offer you the best interest rate and fees on a DSCR loan because their pricing engine told them, but your specific scenario may not fit. for example, a deal I am currently working, First time investor, First time home buyer, living rent free, seeking 80% LTV purchase, Using Short term rental income to meet DSCR, with gift funds. 

Apparently there's a house or two where buyers paid him for their house and he had to stop in the middle of their build as he went bankrupt.

what if the buyer doesn't hold up their end of the bargain?  

Apologies for how long it is 😂Background - I have put a back up offer which looks like it will be accepted when the current buyer doesn’t meet the negotiated timeline  to close on a deal which was 2 small single family’s 2bd / 1bth recently fully renovated being sold together on a parcel.