Rockwool insulation......

You can look at a mobile home and see it as an easy rental with new carpet, trim and some paint but there are other bigger uglier expenses that can come up.Roof Replacement, soft floors (water damage) in kitchens and bathrooms- most floors are particle board, exterior door replacement (special order), underbelly insulation falling, bad hot water tanks with rotten floor underneath (real joy), bad windows (water again), bad bloated siding (water), water damaged base frame around perimeter of home, cracked tubs (special orders) and frozen pipes (Good luck finding a plumber to come work on a mobile home- they do not exist). 

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On paper returns, look excellent but when you put it into practice, you don't seem to get the same kinds of returns. 

Multiple investors with decades of experience, some GP, some LP, some skeptics about the entire business in general sense and some bulls who have gotten rich from investing have all chimed in on this you got links to specific case studies from Brian Burke, a seasoned syndicator, a guy check from Melanie p, who makes it a part time job taking the trash out and exposing the shenanigans of one syndicator after another.Greg Scott has an excellent reputation on these forums, and provides a counterpoint to Melanie’s skepticism.

@Drew Sygit, thank you for the excellent reply!

I make sure they're well insulated, have replacement windows, spend more on nice flooring that looks great (plank style / wood-look porcelain tile, hardwood or click-together LVT planks, not peel-and-stick squares). 

I would think a significant focus on marketing to fill the funnel would be needed to keep the volume coming.Again, I can't share from experience but $60M/year isn't a one man show using Excel.  

The problems with the project mostly stemmed from the crawl space work, which required shoring, replacing structural members, leveling floors and insulation. 

Winter doesn't bring too much extra cost as long as the home doesn't have outdated appliances and has sufficient insulation.