This property need a everything. 4 updated kitchens, Baths, all new HVACS, New Roof, 34 new windows, all new plumbing.

Sometimes you have to update certain components like, electrical, plumbing etc.  

I am not zoned for adu, but am trying to figure it if I can run plumbing to the semi attached garage (no conjoining doors or entry ways to the house) and just sleep in the garage when the house is rented.

This would be a screaming good deal in my mind except all the units need new plumbing, electric, new appliances, new cabinets, paint and some other lesser updates.

You could like getting into construction and want to take some electrical, plumbing, or construction management classes. 

You have to call the city planning department and ask if you need permits for demolition, construction, plumbing, electrical, landscaping, etc.

If the tenants have dogs are any of the aggressive breeds.The Year that the following were updated (either partially or fully) would be good to know:- Heating systems- Roof- Plumbing- electricalSome companies will not write properties with systems that have not been updated.

When you let someone moving in know that you do inspections on plumbing and working safety features every 6 months you will lose potential tenants that smoke, are planning to move in more people or pets that you don't allow, etc etc. 

Brand new construction or down to the studs rehab is very different from a 1940s original plumbing.

The plumbing is already in place but both Lots are on the same water meter.