A private lender would be very pleased with that degree of "skin" in the game.  

Even the new drug that they invented like Semaglutide, is working also towards lowering blood sugar.All these from "fasting" to "semaglutide", is just methodology, to lower the blood sugar as main objective.If one is curious on the real impact of it you could  use the device that attach to your skin, to monitor your blood sugar in real time. 

Curious as to why you installed carpeting instead of longer lasting hard surface?

It sounds like if you just structured it giving him commissions it would not really work out considering he clearly wants more involvement/skin in the game on the project.Maybe just split it LLC 50/50 and the commission savings is a preferred return over his split on the exit?

I am finally ready to get out of analysis paralysis and get some skin in the game!

Then you'll have surface parking, landscape, etc.

If it's just surface mold that can sprayed, washed, and cleaned up that's way to high. 

This concerns me as the investor appears to have very little skin in the game.

 ive delt  with the lead inspection with several of my bosses homes          this one guy has done 8+ of our homes so far    hes very concerned about the kids if any that live in the homes, because they are the ones  in direct contact with the walls and are very touchy on the walls and surfaces where lead could be ..   

Landfills make me think: odor, smoke, noise, bugs, and water supply contamination.Construction on top of landfill: additional costs, abnormal settling, off gassing, heavy metals, and surface leaching if a capping fails.