This is a side hustle for me as I’m a Sales Manager in the Medical Device space full-time.

We updated electrical device and he needs to bring power in from the pole to the new panel and wire outlets, switches etc.

Then decide on device later

Package management systems, smart home devices including temperature control and digital locks, gym and recreation sports facilities, outdoor kitchen and dining areas, and pet services were the most in-demand amenities listed in that survey.

I don't know if you want to incur the expense, but there are devices you connect to your water meter that have an app and will detect a water leak. 

You can also ensure the home has proper security devices in place like deadbolts and window locks.

I would keep a second WiFi network for guests and leave the device in a location they could access.

That being said I have a good job in Med device sales and work for a pretty solid company with good prospects for the foreseeable future so not too concerned about employment for 5 or 6 years and my credit / income / and cash should let me qualify for a property in the 800k - 900k range.

California has a relatively lenient piercing the corporate veil rule so using LLC's as a liability limiting device has limited value and, in any event, absolutely strict compliance with corporate formalities is necessary. 

The use of open fires, fire pits, fireworks, charcoal burning grills, gasfired grills, or other devices shall comply all relevant federal, state,and/or local laws.I am curious, can I just list it on AirBnB and other sites not VRBO?