We currently have a rural home (our very first rental) listed for rent in Ozarks, MO and have had some interest from some potential tenants that own horses.  

I'm wanting to start this as careful as possible and really don't want the cart before the horse.

Trying to guess ATVs or rates is a waste of time, go to the horses mouth and learn. 2.

Make sure you have all your expenses included when you're looking at the return.Overall, it sounds like you have the cart a bit before the horse.

But even the best brand that is well installed will fail if you neglect to remove build-up of environmental conditions - allow the compressor to swim in horse manure and the air-handler and duct work to be dirtier then a wood-burning chimney.Most new installations should warranty their labor for 6-12months at least, and therefore most will generally offer to perform first 1-2 PM services for free.So, assuming you don't have a lemon product - which you'll know during the first year anyway - the ongoing preventative maintenance on a good, properly installed central AC system can really be done by you, or anyone working for you:1.

My focus has been on cash flowing real estate and have purchased an indoor storage facility, a horse farm, a two tenant retail building, a mobile home park and other commercial and residential properties. 

Go to the "horses mouth" call the TREC and ask if they consider an activity a violation of law, they will tell you.

I had one guy (on here) who sent me videos of him in his "financing empire" high-rise office overlooking the city, videos of him and a semi-toothless friend trying to pet a horse, and videos of him touting his "handywoman" as he walked through a gutted home that needed major remodeling.  

My property is ideal for a custom-home site or place to hold a couple horses.

You're really getting the cart before the horse not knowing the basics of RE before jumping into foreclosures, buying out a bank and getting "creative", you need to see an attorney there to put this together for you, she (your buyer) can pay the attorney and represent her, or you pay to represent you, better as often, an attorney can complicate the interests of the other party, that's their job.