We countered back at 149k, buyer countered @ 146k, I accepted but now.....Buyer is asking that if the appraisal comes in low, I split the difference between appraisal and the purchase price.Context of situation is I’ve decided to sell and 1031 exchange in hopes to buy a 3/2 to further invest (buy/hold). 2 Bathrooms tend to rent out better.

We countered back at 149k, buyer countered @ 146k, I accepted but now.....

Best case for most investor buyers would be if a tenant is month to month, so then as soon as you close on the property you could present the existing tenant(s) with YOUR new lease with your preferred terms and likely higher rent rate, and then they will either accept or you can negotiate or decide to give them notice.

Has anyone used Zelle to accept rental payments?

Remember in law, ones actions can constitute acceptance of terms even absent written agreements.If they never had a lease but continue to pay and stay then the tenant is an "at will" tenant under a periodic tenancy (i.e. month to month).

@Josh Oaten   A Short sale is pretty much a normal purchase for a buyer - other than it usually takes some extra time to get offers accepted.  

Once you accept someone with a so so credit or start turning a blind eye to things that pop up on background checks or income requirements, what you do for one you must do for all. 

It means they'll only accept offers from owner-occupants for the first 15 (I think) days.

$340k (Cash Flow: $770/mo, Cash-on-cash return: 10%).It seems incredibly unlikely to me that the seller would accept an offer over $200k below their asking price. 

I sent them an email and I call later to see if they'll accept either.