Tenants in Common(TIC) - both parties would be on title and there is a TIC agreement that shows ownership percentages.2.

Your labor is not included, so all you can claim is materials or costs paid to third party contractors.

@Steve Do If I'm not too late to the party, I'd be happy to chat with you about this.

the potential issue with you is that this is a related party. 

And yes I know, you are not the type of family.....but if someone rents the place for a party and does a decent amount of damage. 

How do you guys think I can/should put this together in a way that can be both something I put out there and make available to interested parties, but also protect the fact that I put all the work into figuring out how to package it up and make it work in terms of financing, zoning, constructing, etc?

FHA appraisal came back VERY low and all parties thought poorly of it.

If they can grow, especially because of your referrals, then you’re doing your part. I

If you're presenting an offer and the other party accepts, you have a binding contract that is subject only to the contingencies you list. 

In this scenario, it felt more like a private street and was not a value detractor for either party.