1031 exchange from a sale of a rental property plus HELOC to fund the remaining.

There is plenty of good turnkey properties on the MLS for sale that would cashflow using the 1% rule and you wont have to overpay for them on a "promise".

I would imagine the bigger loan origination companies out there who underwrite like robots because they are lining up the sale before closing  will be the exception and require those docs up front. 

Title company processes transaction and finalizes sale.

You need comparable sales BEFORE you spend $175 or the appraisal will come low to your expectations.

You can use any money you want from the sale to pay personal loans. 

The average sale price for Condos in the NYC Metro area is $649,000 in the last 6 months. 

I’ve used seller financing as both a buyer and a seller and it can make a lot of sense in certain circumstances (for example I used it as a buyer when I reached the maximum number of conventional loans I could get, and I’ve used it as a seller to both increase my net proceeds (due to collecting interest as “the bank” in addition to the sales proceeds) and to lessen my capital gains tax hit by spreading it out over a few years).

Alternatives to ConsiderIf you want to involve an entity for liability protection or other reasons, here are some potential approaches:Assume in Personal Name and Transfer to Entity:Assume the loan in your personal name and later transfer the property title to an entity.Important: Transferring title may violate the loan’s due-on-sale clause unless explicitly allowed by the lender.

The beauty of an Airbnb is you can offer it for sale while still renting it out.