In my state the property owner can run his own electrical, however it is subject to the same codes and inspections. I have a external 30 X 50 pole barn. I had the electricians come do the wiring. I told them what I wanted and two of them did it in about 4 hours including running a 100 amp box and installing the lights. I had them run in conduit. To me it wasn't worth the savings. It would have taken me 4-5 days reading the codes, going for supplies, and doing the work. The had everything they needed right on the truck.
When working I had more money than time. In retirement I have more time than money. Love the time, miss the money.