Joint Venture is when all investors are actively involved in the deal and equity ownership is tied pro-rata to the $ amount invested. 

Do you mean that this lender will put the money in your account and rely on you to pay your seller, pay pro-rata taxes, pay all escrow and title insurance fees, closing attorney, and all other closing costs?

I'll admit I'm not so sure on a very small deal like this, but at the institutional level, commercial tenants all pay their pro rata share of operating expenses (OpEx) (also called CAMs), and that usually includes paying for engineering and property management, among other things.

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

We are good.Instead lets say the customers were spread Pro-rata. 

"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.