I’ve not heard of using a hot tub to cool off.Yes there is a cost to maintenance and electricity, however in my mountain market it’s probably worth $10k in extra bookings/year.

Check the electric, check the mechanicals, be absolutely sure you're not buying something that will cost as much to renovate as you paid for it.

I have the electric and water turn on recently.

And that was high end finishes, brand new plumbing, electric, recessed lighting etc... 

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.

It’s been a while sense I took the test but I think it allowed you to do everything but electrical and plumbing.

Grounded electrical all code conforming.

., legal as park, nonconforming, grandfather)-Master gas or electric?

(I'm also in San Jose) You can do:Stick build - fully customized takes the longestPanelized prefab - where the framing, electric, and plumbing all happen in a warehouse and walls are laid flat and then transported.