Electrical, plumbing, HVAC are not huge issues to deal with just a matter of the cost.

Item Material Cost Demo $0.00 ExteriorFenceDecks $620.86 Landscaping $0.00 RoofGutters $0.00 WindowsSiding $0.00 Paint Contractor to provide paint Kitchen $7,508.67 MasterBath $2,147.78 GuestBath $1,441.61 InteriorFlooringBedrooms $6,750.84 Plumbing $71.76 Electrical $344.82@Sergey Tkachev - Hi there! 

You will need to talk to an electrical contractor and find out the best way to accomplish what you want to do. 

Complains that the solar panels don't pay for 100% of her electricity despite the hottest summer in Texas in years.  

If you were going to bet on the next best performing electric automobile maker, would you invest you half million with Elon Musk...or the guy tinkering in his garage down the street? 

Some people use 5%Utilities: Tenant pays for electricity/gas, water, sewer/garbage in Indy.

The first step to learning what options you have is understanding where existing plumbing, mechanical, electrical, structural, etc. is located. 

Sure, you're not going to jump in your car and drive all the way over there just to change a toilet flapper or electrical receptacle (2 repairs I recently had to do), so just call your handyman and have him knock out a bunch of "honey-do" items in one trip, including the furnace filter (as recently discussed on BP).

Total rehab, gutted kitchens and baths, all new plumbing, electrical and he added central air/heating.

I have a dedicated server that I donate CPU time to them, but if I donated the cost of electricity per month in cash I would be able to deduct it.