Yes, my mom would pay rent; or rather, I would be paying it but for purposes of the analysis I'm just assuming a regular tenant.

Personally, I want to vet the sponsor and broker via detailed analysis of many offerings over a length of time, before I am in escrow, even if the actual deal I end up choosing is not the ones used for my vetting.

Any mistake I made on this analysis?

Get detailed quotes on these to ensure it’s cost-effective.Zoning & Permits: Verify that your current property allows additional homes and meets zoning requirements for multiple units.Rental Demand & ROI: Assess demand for singlewide rentals in your area to confirm it’ll be profitable after all expenses.If everything checks out, these could be solid additions to your portfolio.

It's impossible to give a definitive answer on whether you should sell or keep the property without the address and further details but based on the photos alone what I would first suggest is an amenity analysis.

@Dwayne RamseyThank you Dwayne, that sounds like some details to dig in to.

Once we have platted lots all engineering details are done . 

Thanks so much for this detailed answer.

Any details of your experience and how it works would be greatly appreciated.  

I found this opportunity through a detailed Zillow search I had pinpointed the specific streets in the neighborhood I liked.