We also had to have the plumbing and electrical more or less 're-certified' by licensed electricians and plumbers - which some of which wasn't done to code either.

This little cabin was going to cost as much for the sub work (HVAC, plumbing, electric, etc) as our big cabin.Be thankful you got a new build when you did (we are!)  

In my area the common ones that fall into that category are garbage and sewer but in other areas they might also include things like water and electric even.

We pay a managing company to do everything, but it’s still more work compared to long term rentals like paying monthly electric, water and utility bills etc.

When I did a room addition I purposely added electricity and doors so that the house could easily be split. 

Yes I already figured on having to pay gas and water already making 2 units electric heat.

Some of our clients have even installed two separate electric meters on the property, which would require two separate addresses.

Renovations, starting two days post-closure, included overhauls of kitchens, bathrooms, flooring, electrical, and plumbing systems, and the addition of in-unit washer-dryers, with an average expenditure of $33K per unit.

Maybe get some electric scooters or bikes and just charge the guest by the minute.

I went as far as separate electrical meters.