We have also completed some exciting improvements including retyring a boiler for heat/cool ductless mini-splits and 9 units being electrically updates.

If you're in the real estate investment business and must watch every penny, irrespective of your time, then by all means, do what you think will keep your expenses to a minimum.If, on the other hand, you are really in the business of creating profit by way of being a good marketer and a committed dealmaker, your creative energies ought to be reserved for doing what you do best (or intend to do best)...

Often electric baseboard is most cost effective.

A connection of mine is well established within the energy realm in NH.

5️⃣ Energy-Efficient Upgrades: Solar panels = tax credits!

You have 3 things you can invest: money, time and energy.

So if you had electric included but there was a black out, would you refund here for getting a generator?

If you have the time and energy it takes to wholesale, then that can be a good idea to build some capital and get your foot in the door. 

You could make the same amount of money (or more) without the time, stress, or energy required as a DIY Landlord.If you do decide to manage yourself, you need a quick education.

Then there are some in between that may have a composting outhouse and a hose spigot, but no full electricity etc.