I am looking to potentially do the following for each unit: Remove the steam radiators and switched to forced airAdd central ACSwitch to gas (gas line is coming to the house already for cooking)Add hot water heaterAdd a sub panel for electric (only needed on 1 unit)I realize this is a big job but I am getting quotes that I think are very high.

Or (2) I could get a equity loan (or HELOC) to remove the mobile home and replace it with a newer mobile home/modular home/stick built house, build a road to the house (dirt road now), and also put the infrastructure in for 2 RV spots (pads, electric, septic) and convert the property to a SFH (or is it MFH with RV spots?)

Also check electrical breaker box and make sure correct breakers brand and size are used for each connection for the brand of panel that is installed.

The tenants pay electric and trash.

I would try some research , maybe try to find a contact for the other developers that had in mind to do something in that neck of the woods and see if you can't get some insight about getting utilities there for a major development like water, gas, electricity and sewer.

The electric company remounted the entrance cable, but told me I am responsible for repairing the damage to the feeds and meter bases. 

I have a property on the Oregon Coast that I need to replace some electric baseboard heaters.

I would never suggest doing it under hardwood but the system I use is electric and all of my projects have had positive feed back as you can adjust the temp. and choose what time the floors are heated.

It sounds like that's about where you are, with your "15% markup".Other stuff is where it starts to get expensive -- cabinets, doors, windows, roof, mechanicals, plumbing, electric, landscaping, etc.

Then go to as many REO properties as you can and practice your skill set.Here is some more info that should help you:Break up the home into sections - Kitchen, baths, flooring, paint, stucco, landscaping, plumbing (including fixtures), electrical (including fixtures), HVAC, interior doors, door casings/baseboards, windows/sliders/front door, roof, foundation, misc., and garage.Once you know what the common costs are for each area for a specific size home, you can see how easy it will become to walk in and walk out 15 minutes later with a rehab figure in your head.For instance, I know that a full gut and remodel including new toilet, new vanity, mirror, sink, glass door enclosure, stone/tile on shower walls, etc will run me $2500 per bathroom.