Possibly month to month but not beyond the agreed date  with a pro-rata clause that escalates if he stays beyond the agreed date of leaving. 

Having your proverbial eggs in multiple baskets rather than one.For example: Imagine taking the proceeds of your client’s sale, and instead of investing the entire amount in 1 NNN property or 1 multifamily in one particular area of the country, your client could break up the sales proceeds of her property into 5 or 6 (or more) different DST real estate investments, maybe multifamily, NNN properties, self-storage, etc…in 5 or 6 areas of the country.DST investors receive 100% of their pro-rata portion of any potential appreciation of the property (net of sales costs).

@Roman Puzey   Charge them pro-rata for the additional days (this is all assuming notice as required).   

What about pro rata and non pro rata LLC's

"Additional Rent: During the term of this lease, tenant shall pay landlord, in monthly installments, a sum equal to the tenants pro rata share (as hereinafter defined) of any real estate taxes and annual operating expenses, each as hereinafter defined. 

Petitioner testified that the lessee, Economopoulos, pointed out to her a dead rat, a bee's nest, and several leaks during her single visit, yet petitioner presented no evidence that she attempted to remedy these problems during her period of ownership.

All cash-flow thereafter will be split pro rata to the LPs the General Partners until the 15% Preferred Return is achieved.

On a ground up development deal - are construction costs split pro rata between the LP and GP?

You should pay less for the home for both the pro-rata rent and security deposit

If you decide to take the new renter I would not keep the earnest money beyond the pro rata amount of days you kept it open for them.