Be willing to work/help for free and bring them value. 

They will sell their home and parents home and with proceeds provide a down payment, The rest of amount would be a lease-purchase.

Two questions...1) About to bring a STR online in the next two weeks and am looking for some advice as this will be my first STR. 2) Specifics on the current STR cost seg. tax benefit?

You will meet wholesalers, agents, investors, lenders, contractors, and other professionals in the real estate industry. 

I hear you on the goal, and will answer your question... after complaining about it. 

I will put a call in tomorrow for the insurance quote!!!!

Do the relatives have to go with them or will they want to stay? 

My son will be helping us with marketing, advertising (if needed), press coverage (if needed) and finding investors / lenders (if needed).

How do investors always talk about having multiple different options for exit strategies when it seems like you really need to know what your strategy will be upfront even before you submit EMD to keep clear books, avoid commingling funds, tax purposes, etc?

We will be creating a new LLC that will own/invest in the property.