Work with a commercial real estate agent like Assisted Living Properties of Texas or Marcus & Millichap to locate suitable properties and negotiate leases.

If you are going to create a let's say 75/25 split, where his responsibility is bringing suitable deals as his equity, you probably wouldn't want your part of the equity to be greater than 75% - i.e. if he brought a unit worth $100k, you wouldn't want to be all in (your purchase+rehab) for more than $75k, such that if you had to liquidate the LLC (let's say just this one unit), you sell for $100k, he gets his "fee" (the $25k in equity from the house value) and you are made whole as if he never brought anything to you in the first place.

It didn't completely solve the situation but it gave them a lot more time to find a suitable living arrangement.

Go somewhere where the barrier of entry is more suitable. 

Now is your tenant suitable for renting through that?

Recently I've been interested in finding suitable vacant land for ground lease NNN tenants.

If anyone has inventory suitable for rehabbing, I would love to make an introduction. 

It may be a year or more before you find someone suitable, during which time your mailbox money will have dried up.There's also a good chance that you will need to invest additional money to fix up the property to attract the new tenant, who is unlikely to be satisfied with the very customized layout of the last one.

And recommend an excavator and foundation company to build a suitable foundation;-( 3.

Seek advice from lenders and brokers on finding a suitable real estate mentor.