These often include a preferred return for the investors and then a pre-determined cash flow distribution schedule between the sponsor and investors that includes the cash flow distribution waterfall based on either the IRR or EMx and possibly a GP Promote. 

Thankfully I had negotiated a pre-determined buy-out right where I could buy them out at a fixed IRR at any time. 

In this approach, the taxpayer calculated that the cost to construct a new building (say, $300 per square foot at 2,000 square feet, totaling $600,000) should be allocated to building and the remaining balance of the acquisition should be allocated to land.Rule of thumb method: Some taxpayers use a predetermined percentage (such as 80/20 percent, 70/30 percent, etc.) for improvements and land.

In this approach, the taxpayer calculated that the cost to construct a new building (say, $300 per square foot at 2,000 square feet, totaling $600,000) should be allocated to building and the remaining balance of the acquisition should be allocated to land.Rule of thumb method: Some taxpayers use a predetermined percentage (such as 80/20 percent, 70/30 percent, etc.) for improvements and land.

Unless you have an extensive predetermined list of cash buyers and know what those particular buyers are looking for, 30 days goes by real fast.

How much they pay is what is negotiable, whereas before that was predetermined in the listing agreement.If you don't want to pay, let your agent know and that becomes part of the negotiations.

I have 14 units and about 60% pay on time and 40% pay late( past pre-determined due date). 

It must be communicated to both buyers and sellers that commissions are not pre-determined by law and are fully negotiable.

When the transaction closes, the purchase is funded, and we set aside additional funds in an escrow account to pay predetermined professionals to make any required or desired repairs or upgrades to a property AFTER the buyers settle on the purchase transaction.

Is it because they will become a 50% (or other predetermined %) equity owner if and when it all goes pear-shaped for you (again)?