Is there a breaker panel or a fuse box?

For regular 120 V wiring, if there is an overload or short, the Romex might temporarily have to handle several thousand watts, without getting hot enough to start a fire, before the circuit breaker in the main panel pops. 

This reduces unnecessary service calls for items like a flipped breakers, reset buttons, etc.

Another cool electrical tool is the circuit finder (not sure on the name).

I've met with a electrician and he said I would need arc fault breakers because it was the new code.

No but I had some identity theft about 8 years ago an the person used my info to get credit cards from home depot, circuit city, wal mart, and about 3 or 4 other places.

If you are bringing the electric up to code the garbage disposal should have it's own circuit.

Look at the rafters to see if they are pulling away from the ridge beam or is they are bowed or cracked.For the electrical, pull the panel cover and see if you have corroded connections, aluminum wire connections, wire sizes correct based on the breakers that they are attached to, ground wires visible, signs of burn marks, etc.For the plumbing, run everything at once.

That being said, there are tenants with pets who will be happy to live with pre-damaged carpets.Pet damage can be a real deal breaker.

I also try to short-circuit that by only purchasing properties in areas that have high demand for rentals.