We also try not to install fridges with water dispensers or ice makers but if we do, we put in our rental agreement that tenant is responsible for any repair to water/ice makers. 

There were a few other things I believe which are destroyed including carpet which was newly installed a week before she moved in, but b/c it is 7 years, I can't do anything about it from what I read on this forum and other people asking these questions. 

Since then, he has had to replace the windows (the seals got old) and now he has to install all new plumbing.

As for load bearing you should be able to install a double 2x12 header, for openings under 36", If you can DM me, with pictures I can provide further feedback. 

HVAC duct work insulation is also deteriorated.No vapor barriers installed eitherSome fungi/mold growth notedPlumbingMultiple small leaks under sinks and from bathtub and toilets.House has Polybutylene plastic plumbing which is dangerousMain shut off valve is damagedElecticalSome small exposed wiring and bad splicing.Whole house has no GFCI's or grounding outletsInteriorMoisture spots on ceilingExteriorLose Vinyl SidingDoor Jams and Window trim have moisture damageDriveway need replacementRoofingMinor leaks noted in atticRecommended to replace roof covering, but not whole roofSome fungi growth noted in roofSo some of the question I am trying to tackle with this work is:How much should I budget for the main issues listed? 

I'd love to chat with someone in regard to your pricing strategy, shed / stall accommodations, time in stall vs pasture, etc.

Do you prefer it over installing dry wall?

I already have Smart locks installed, so I just really need help with finding good tenants and the initial screening/leasing process and responding to emergency calls/work orders.Thanks

If we were to install 3 more high efficiency heaters that also boil water.

They installed bidets without my permission and created plumbing issues so I had to pay for a plumber to come out several times, I've had to replace a frontdoor knob and deadbolt last month even after we rekeyed the home prior to them moving in, the garbage disposal blades were jammed so had to call a handyman, repaired a broken window which my property manager claims was broken prior to them moving in even though the repair was made 3 months after they moved in.