He believes that area where he will be buying the new homes is going to appreciate and attract more MTRenters, but now, the big difference is that he would now have 3 properties that can go up (or potentially down) in value, go up (or down) in rent, and three times as many vacancies to fill.My back of the napkin assessment is that for only a drop in $200 a month in cash flow, he would control a lot more assets with growth potential and as rents rise over the coming years, the combined rents will increase to a total more than the single rent.HOWEVER.

The cleanest route but the least attractive method for most investors is to have the investor provide debt.

Alternatively, your sibling might use a 1031 exchange to defer taxes by reinvesting in like-kind properties, though this doesn't directly fund a primary residence.Other ideas include leveraging a HELOC on the rental properties for the down payment, taking out a 401(k) loan, structuring an owner-financed agreement, or a lease-to-own arrangement.

Our project management kept everything on schedule, making the property highly attractive to buyers.

THE attractive feature to me of MHP is renting the lots, not renting homes.   

I imagine other people might have good alternative suggestions too. 

There's now so many out there offering the same coaching and mentorship programs its' become a race to see how far each can embellish their success and guarantees in order to attract their clients. 

Maybe pay a financial advisor for an hour of his time first in case there is an alternative that you have not seen yet?

Alternatively, consider bridge loans, HELOCs, or post-purchase refinancing to preserve liquidity.

Putting people in a position where they would need to sell or come up with an alternative strategy to pay off the mortgage balance prior to rebuilding.