Do you install USB electrical outlets?

Short story in case you get bored: I spent $13,500 (hired out electrical, plumbing, and mud/tape/texture.

The total cost of rehab for this project was just under $16,000. major rehab break down:-unfinished attic was broken into 2 large bedrooms - new attic window to meet egress-upgrade electrical -carpet second and third floor-laminate flooring kitchen/bathrooms-created a new bathroom on first floor.

@Michael Plante the wires running from the barn electrical box to the multiple lights hung throughout the barn run on metal.

I'm sure there are possibly others like the plumbing or electrical behind walls.How do you estimate the costs for such items before making an offer?

From what i understand it will need a full gut, new electrical, new plumbing to replace copper pipes missing, new drywall since electrical and plumbing needs replaced, along with probably new flooring throughout, paint, kitchen cabinets, bathroom vanity and tile...

A good size container is under 3k and then you need to run electric, plumbing, hvac, after that you need less money that you expect. 

That said, you can expect this property to have problems like: no functioning HVAC, electrical problems, old water heaters, low rent, old appliances, worn carpet/torn linoleum, leaks, etc.Sometimes the rents are not able to be raised for that block, or you may not be able to justify raising them enough for a good return after repairs.  

Do you have pictures of the separated mailboxes, doorbells, electric meters, ect.2.

The next step would be to build the improvements - grading the site, putting in the roads, putting in the sewer, water, and electric such that houses/duplexed/industrial can be developed on the property.