You can reduce this risk by purchasing materials and then paying the contractor in increments.

How is buyers seeing a house online not agent-driven when all of those listings were entered by agents? 

Many insurers have started slipping in language that excludes certain coverages on roofing material. 

Although I rarely watch any of the gurus promotionial materials these days, the 40k flip program caught my attention enough to watch the pitch, especially when I saw him mentioning N.E.

I am very handy so would do any upgrades and he would pay for materials.

I've actually driven by a few of these on daily commutes.

Then you need to materially participate in the activity, here are the tests to meet MP: https://www.investopedia.com/terms/m/material-participation-...I recommend tracking your hourly diligently in a material participation time log.

The costs involved are about $100.000 all in (permits, engineering, architects labor , materials ) - I’m thinking that would be a better long term Investment than another SFH . 

In this case, the material cost AND install costs will vary, so having an idea before you even meet the contractor is important.  

I am assuming you would be paying for materials and replacement appliances, etc... so $1000 per month for labor to take care of 5 mobile homes should be seriously looked at down the road.