Hey Jacob, I would recommend top 10 ways to protect your assets (FREE E-Book) by Royal Legal.

I own a digital marketing agency (high stress for sure), make 7+ figures, and have a family of four to support (my wife doesn't work).

BP eBook on Wholesaleing:https://www.biggerpockets.com/renewsblog/2015/01/3...Two Great reads that were suggested, J.

. $4500 seems like A LOT of money to transfer our digital plans into CAD (the contractor already built-out our design ideas on his laptop's software) and have an engineer ensure we're using the right beams in the right places.

Unless you can provide your private lender with secured double digit returns, I agree with most, your dad may have to do this on his own, or simply have you intern with him on this deal. 

Personally I would invest in a fund with an 8%+ preferred return with equity split that pushes the realized return to double digits before I would pay off that debt.

I know of a few funds that offer preferred returns, and project double digit returns in total.

Currently I add the guest's last 4 digits to the locks as a code remotely a few days before their check-ins.

A lot of design questions can easily be answered with pictures and digital correspondence. 

About 500 posts a minute of people that never make it into the double digits on their posts counter.