The electric panels need upgrading and it is a huge cost since DWP is requiring that I put all the new meters (4+1 house panel) in one location, which requires a 40 ft trench to connect the two buildings.

I will need to check on electricity, etc.$50k is after the property is paid for. 

Multiple small expenses and 1 big electrical one at the tune of $4500.

I understand your dilemma and we have the same background too - I went to Greater Lawrence Vocational school for electrical and worked in the field for a long time but never got my Journeymans license.

I've got all sorts of off the wall skills (wood working, tile, welding, auto repair, computer/network, electrical, ...etc), which I know is going to be my greatest strength while also causing me to struggle with hiring help.My wife and I bought for 160 in north Austin, and sold for 260 after doing some serious bathroom/bedroom/kitchen remodels.  

Electrical and plumbing systems are pristine and up to code.

A place like Home Depot is great for a lot of things but they don't carry all of the plumbing or electric supplies necessary for every type of job.

Both have separate gas lines, but the “apartment” gets its water, electric, etc from the main home.

We also need at least the house electric on for smokes and COs, which is law. 

I'm attaching a picture of the electrical wires I have available: 2 wires for condenser units and 1 wire for HVAC.