I spend a total of 5 days a month performing maintenance related duties(replace flooring, windows, plumbing issues, ect.).

My longest recent rehab was 2.25 months and added a half bathroom, took down 4 walks including load bearing, put up 3 walls, new plumbing, electrical, flooring, huge percentage of drywall, an eye brow porch, new kitchen with full layout change and new bathroom with full layout change.  

For older properties, expect a higher CapEx due to potential issues with major systems like roofing or plumbing.

I can fix almost anything and have experience with electrical, plumbing, flooring, roofing, siding, drywall, etc.  

You still have flooring, cabinets, bathrooms, plumbing, insulation, paint, etc, so all that cost remains the same it would seem. 

@Jewell ArceneauxHow to drive ARV (my opinion)Improvements that drive the ARV the most: Roof, New Kitchen & Bathrooms, Flooring, PaintImprovements that DON’T drive the ARV as much: Windows, Landscaping, Driveway, Rough Plumbing & Electrical

Unlike a kitchen or bathroom renovation your literally building a second house on the property and your dealing with everything from grading, soils, foundation, electrical, plumbing, framing etc.

Water leaks, problems under the trailer ie insulation falling, a tub cracking, a new roof, frozen/cracked pipes (usually in January- and plumbing companies simply will not respond to mobile homes), rotting siding, bad exterior doors etc. 

Water in the plumbing system freezes at 32.

I don't remember their names but people from the War College helped us redo the electrical and plumbing for cost which was amazing.