There will be no way to finance at high percentage of what is owed due to in effect buying the sub to position.  

at its most basic titling the TIC, does not require equal contributions it's just a deed defining percentages.

Many national STR PM companies working on a percentage of gross income (Daily rates + cleaning fees) charge an elevated cleaning fee.

Let’s say they provided it for 100% free retail Buyer profits in exchange for a percentage of your profit.  

Yes, probably 50/50 to start and then once you have a strong track record with them, you may have the leverage to try to get a higher percentage on your end since technically what you're doing is more time intensive than what they are doing (cutting a check).

I review all potential charges with my owners, and we only collect the commission percentage on late fees.

I would say you only qualify for tax free gains on the percentage that was your primary.

My preferred money market is currently at virtually that same percentage as the cash flow.  

Besides I bet this guarantee is for a limited time (it's often for one year only), whereby the profit the developer makes on the sale of the properties is much bigger than the potential loss he would incur should the occupancy fall short of the promised percentage.

Mixed-use fairly simple need to ensure the percentage % of the commercial space versus residential is within guide lines.