Asses your position and  find a workable arrangement. 

@Josiah McGinnisNo, dont let him do it or arrange to have it done.If you feel the need, $89 @ HD and an hour of your time to install it will get you a happy tenant, a new efficient toilet (installed properly in your property) and him not asking to do future repairs himself.

The wholesaler has zero skin in the game and leaves the seller high and dry.This is the reason I said above that if it were my property, I'd be looking for at least $10K, non-refundable after 10 days.Meanwhile, the seller has made his new living arrangements and has possibly made commitments to others based on the influx of cash - commitments that he can now not complete. 

When they contact me I let them know we can make arrangements for payments.  

Always arrange your lending first.

You are fair, but won't be making special arrangements.

Usually if there is no communication the lease goes into a month to month arrangement, and she may be assuming this is the case.

@Ashley Silwa  Arrange your all the paperwork and talk with lender you would like to work. 

@Justin Eaton often arranged those meetings.

Are there any verbal agreements or arrangements between the current Landlord and Tenant?