I don't think you can raise the rent by installing it because most guests aren't going to be using it anyways and it will prevent guests from booking potentially because your price is higher than others.II say all this as someone who drives an electric vehicle. 

Of course, with all things, the answers to all these matters will depend on the circumstances.California tends to have more laws on the books and requirements and restrictions that it can be a good idea to form a CA LLC for out of state property so that you as a CA resident are covered, and to try to have your contracts fall under the purview of CA courts.

Bad snow (no snow or less snow than normal) = less bookings and lower rates due to decreased ski demand. 

I just picked up the book on investing in real estate with no (and low) money down.

You should not allow any adults to reside in the property without being screened, approved by you, and on the lease.Here's a detailed guide on how to screen applicants: Application Screening Guide

A ton of blogs and she has her book on there as wellhttps://syndicationattorneys.com/Gino

But you can’t use your “profit” as a guide when your buyer will have a higher interest rate on a higher mortgage with a higher downpayment.Goodluck. 

I will gladly explain more to you or if you want to get my book on Amazon you can find it regarding Sub Tos and Lease Options. 

Start by reading the Ultimate Real Estate Investing Guide: https://www.biggerpockets.com/guides/ultimate-real-estate-investing-guide/introduction2.

Your CPA is the best resource for guiding you through this decision.