I would never steer business away from my company, but I have an abundance mentality and a ton of respect for those people I mentioned on here.  

This is precisely the mentality that has so many homeowner's in trouble today.

Drugs and alcohol, skip on bills and family, incarceration, severe mental and emotional issues, senility and death.

I found a few properties to put offers on but now I find myself in a mental tug of war match between investing or paying off personal debt.

Plus knowing I was going to be following up with them put me on the back burner of their gray matter some what and they  were actually more ready to talk to me when I called instead of the I really haven't thought about it  square one type answer because they hadn't, your first call was basically in the discard pile mentally.

If you understand the investment and all the circumstances about investing in property out of your immediate range of distance and you are prepared mentally and financially, then go for it! 

It's a lot of mental work.

To answer your specific question, if the disability is mental or developmental he may be legally incompetent and unable to bind himself by contract; in this case your lease.  

I had (and still do sometimes) a poor mans mentality.

But seeing as we are a community of creative investors our mentality always searches for opportunity where no one else can usually see it.