it seems like the partner with the mortgage is taking on additional risk and not allowing him/herself the opportunity to finance other deals in their name.

I recommend starting with first liens...either performing or non performing depending on what what you are looking for.  

The buyer is a partner in another successful business, and does have income, but is refusing to use his other income to pay the debt.Current debt is about $180,000 with interest as calculated if the note was performing; however, there are provisions in the note that it goes to maximum legal interest if it's in default, so with that plus late fees, it comes to more like $220,000.I've had my attorney review the note. 

 So on a deal like this I asked myself how good is the deal for the additional risk.

Additionally, if the debtor changes jobs, you'll have to go through the garnishment process again.

Exactly - in addition, you're going to have to lay everything out on the table for the professionals you ask.  

Additionally, if you are looking for guidance when it comes to REI, I am your guy, you can PM me any questions that you have, I would love to help you out.

We put all occupants of legal age on the lease for the reason of additional parties to encumber if needed.

IE sorry the deal didnt go through, heres a little something to help defray your additional holding costs. 

If your biggest thing is safety, I'd talk with the neighbors, and tell them you'd like to build additional safety measures and improvements on the portion that's your land.