If it does not sell they will reduce the price on a predetermined schedule.

Both sign a predetermined payment schedule before the start of the job.Will you agree to sign lien releases before I pay you?

They didn't just have a pre-determined figure, and stick to it.  

If you are leaving the water on in the property you can purchase freeze alarms that you can place in basements and crawl spaces that will alert you if the temperature drops below a pre determined temp, additionally many of these sensors can detect water so if placed near a hot water heater or water source they can alert you if there is a leak or backup.

Rent increases are usually predetermined in the lease, so even though it may be a three year lease, there are annual increases.

Some apartment buildings to offer co-op commissions, however, it should be predetermined and or discussed during the first visit with your prospective tenant.

@Anna LoweThe main point is to attune your strategy to the market as you find it rather than trying to shoehorn the market into some predetermined strategy. 

predetermined dates for one partner to liquidate? 

In exchange for this service she is to pay to you a pre-determined amount of money.

Move all the contents to another location and advertise/sell at predetermined times (once a week, once a month).I suspect you're probably overestimating the value of what's in there, but if you are not then you have a serious win on your hands as you got the house for virtually free.