I'm guessing nothing .....I'd offer them a flat fee (1.5x rent) or tell them they will owe rent untill the unit is rented or the lease is up.

Or, google “flat fee mls” and there are plenty of sites now, which are in reality brokers, that will let you list your property for a flat fee.

When he wanted to go through the second sellers contract the same way I flat out refused. 

This year I've successfully flipped a house and purchased a currently fully tennanted 2 flat.

If past that date I'm not getting paid, so my vendors aren't and if it happens multiple times I switch vendors and part of that monthly mgmt % is for my time to manage this process and/or find better services for you. 2) Get agreement on flat fees for the various routine cost such as landscaping, inspections, lock changes, etc, and require them to submit their vendor invoices as backup.

The simplest way is to just write a flat fee for water / sewer into the lease as a line item.

I paid a flat 10% for all the money invested, and I rolled the interest payments into the loan so that there was $0 out of pocket.

We shake out like this:  I have more cash than time, and he has time and credit, less liquid, and some experienceI've heard and read about everything from equity stakes, to flat percentages, to 50/50 splits.  

I don't have anything listed for water and sewer or garbage, because I am returning that to the tenants with a flat fee.

So on one end of the spectrum, I do deals that would be a flat fee type structure I'm assuming, and on the other end I have deals that would operate like a traditional loan but with a balloon.