My advice is to improve your credit and try to save cash a long the way.

Your estimates will improve the more you practice.

Keep improving the fixtures, furniture, etc.

Initial poor cash flow quickly improves to moderate cash flow, then good cash flow, then great cash flow.Now about the property appreciation… my worst appreciating property has appreciated over $2k/month over my hold period.  

Wondering if the owner of the mobile home/tiny home on wheels receives the tax bill on their unit or if the landowner gets billed with increased taxes for the improvement and just adds it in to the lot rent. 

if all those improvements are paid for then you probably have sufficient equity for the vertical..

You can also improve your screening process to prevent more bad tenants from getting in and then tighten up your procedures so the bad ones don't get enough time to really cause damage.

You'll get ventilation and filtration.Ductless doesn't provide ventilation.But it is much easier to retrofit.It depends on how much you want to put into it, and how nice you want the finished product to be.When you say "heat" do you mean propane, gas, oil or electric?

I'm looking to improve my commercial investing knowledge. 

People seem to measure your success/value/achievement with your house, and neighbor quality, to an extent, improves with house value.