Properties built that old typically come with more repairs and cap ex, which can eat away your cash flow.Major things to look at for would be how recent the plumbing, electrical, HVAC and roof was updated.

This means that I pay for the water, gas and electric to cool the condenser in the summer.

I split off the electric meter for the ADU, so that will be billed separately.

Main house - Added 4th bedroom, new plumbing/electrical, new flooring, cosmetic refresh.

Also, since I bought mine in a rough D area, I already addressed most all of my major issues during the rehab because I bought the house for 18k and spent 12k on hvac, electrical, plumbing, etc.

There’s a new company in the US that produces them as electric vehicles, they have back up cameras, are street legal, Bluetooth radio, etc.

Same thing with the electrical box.

 $200/psf doesn't sound too extreme for San Diego.But when you say full gut, do you also mean all new electric, new plumbing, new roof and gutters?  

They come with plumbing and electrical already built into the home.

Them being the 3 mechanicals (HVAC, ELECTRICAL, PLUMBING) and ROOF.