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). 

We do some cosmetic improvements to bring homes to our standard, typically carpet and paint, upgrade lighting etc.

Tons of deferred maintenance and a lot of work to do to clean up this mess.  I

It needs new carpet, everything needs to be painted, the bathtub needs to be reglazed, and some of the outlets are still 2-prong.

I will need to remove the carpet and replace it with something durable and cost effective. 

(just looking for a ballpark here)- Average number of room turnovers per year - PadSplit says the average tenant stays 9 months- Average cost of each room turnover (room & carpet cleaning, repairs due to wear and tear)- Repairs and maintenance - how much are you typically setting aside for this?

Because the first few months may be great, but after the honeymoon phase, they might morph into messy, noisy goblins.

He finished the kitchen demo and removing all the carpet including the tack strips.  

Not only would you effectively be giving up your right to proceed by way of non-judicial foreclosure, a very messy judicial foreclosure sale might not succeed and even if it did, ability to pass title would thereafter likely be subject to borrower's statutory redemption rights.

Also, the whole SubTo model is a bit icky and can often get messy from what I've seen.