Make sure you let them know if you are performing any of the work, or if the repairs will ALL be made with contractors.

Verify income, credit score, and perform a background check.

Most lenders want a consistent employment of at least 2 years.

In 22 years we've never had an exchange fail where the taxpayer stayed consistent from sale to purchase - whether or not there was a change of title holder through a disregarded entity.

As mentioned above you could just act as lender and record a mortgage/deed of trust with promissory note and personal guarantee from all parties in the deal would be the cleanest way to structure the deal.Another option which could potentially yield higher returns on your money is to become an equity partner in the deal, this could put your money in a riskier position and in the case of a default or failure to perform of other partners. 

My current builder has been not performing on a project I have and it is clear they are not doing anything to change their posture and improve or make up schedule.

Having a poor understanding of business, contracts, state and federal laws, negotiations, maintenance costs, etc. will continue to result in poor performance and finger pointing on both sides of the table. 

Unless you are consistently targeting 1500 sf homes each time for new construction or 750 SF ADU's each time, the costs per SF will always fluctuate.

Their work performance sucks. 

She preselect hides offers, lies her way and consistently looks for buyers so that she can do dual agency to make commission on both sides.