Basically, i think all i need to close the door the Bedroom to the kitchen area, add an exterior door, add kitchenette, and possibly add its own electric panel.

Make sure that you have an inspection period of a couple of weeks to get contractors, inspectors for roof, foundations, electrical, plumbing, etc to make sure it is not needing too many repairs.From what you have said, it sounds pretty good.

I also wouldnt worry about the electrical drain unless you are converting it to an MTR and paying electricity. 

North of town, west of I-5: 95219 Brookside (high end gated communities; Mello Roos school taxes - so high taxes; Lincoln School District; some peat dirt problems on streets; don't know about foundations); Spanos Park West (some gated; lots of huge houses; basically built for commuters just west of I-5; Lodi School District) North of town, east of I-5: 95209 Spanos Park East, Colonial Heights (most Lodi Unified Schools; though small pocket of Lincoln Unified) North of town, east of I-5: 95207 Parkwoods and Lincoln Village (Lincoln Unified Schools; was considered best family area due to Lincoln Schools, but lots of flat tops and built since the 1950s so electrical can be kind of minimal - 1 outlet in kitchen instead of enough to use multiple appliances); lot of remodeling in this area.

I like the smaller plug and play option but wondering if anyone has one and how their electric bill has been?

Old refrigerator will be out on Thursday & new one comes in on Thursday next week. 

The property was built in 2018 and the other unit with power had no major issues and all HVAC’s, water heaters, electrical, etc all work fine.

One guy did the labor aside from the hvac and electrical.

If so, expect to pay an additional 200 a month or more for water, 300 for electric, and a LOT for gas over our long cold Michigan winters.

One option is to rent out an RV (connect to plumbing and electric) and they live in your driveway.