Simply waiting 30 days from purchase is not sufficient.

Also the end developers in most cases are large corps .. it cuts down on their risks and keeps raw un-entitled land off of their books 

If he were, anyone getting a mortgage for a house with an ADU would need a commercial loan, and that's simply not the case.  

Note: it's not simply dust from the house.

There are no short cuts to investing. 

Regardless, a huge expense for a rental property. and finally 3. if the rental price actually goes down, as I believe it will, this cuts into any cash flow on the home.

Campground rentals around here are so expensive at around $800 a month not including electric so this would cut back on my income. 

Why not simply loan your LLC (if you have one) $7,500 to $10,000 and pay yourself interest from the LLC?  

@Vanessa Deluca, they may be undecided on what entity they will take title - LLC, personal name, etc.They also may be doing a 1031 exchange which involved assigning the purchase rights to their QI.They may want the actual purchasing entity to remain anonymous for a while - think celebrities etc.They might be trying to simply get it under contract and then find a different end buyer.When the clause doesn't remove their liability to perform it eliminates most of the unscrupulous type wholesalers and is probably nothing nefarious..

Maybe he got a great deal from a friend's Dad who he cared for while he was sick or he cut some old lady's lawn for free when he was little and she paid him back by giving him a break on the house.