For my personal home I am more willing to pay for the high SEER tricked out units from the big companies (some of whom actually manufacture the budget brands).

Base your roofing choice on the roofing contractors/manufacturer's warranty. 

Either way, worst case scenario, you can get it manufactured in China (will take a long time) but if you go to alibaba or aliexpress I'm sure if you message a reliable supplier they can make it for you. 

You probably need 20 -29% down to make this work plus a large deposit to the modular builder plus cash for permits and hookups.Land purchase $650000 + $150000 modular  + permits and hookups $20000 = $820000 will it appraise are there comps for a manufactured/modular for $820000?

For renters, this means paying a monthly rate for insurance that's scaled to their rent.

Find a DSCR lender with a very subject property based approach to underwriting AND  no cap on the # of financed properties owned so that you can continue to scale your portfolio without the limitations associated with conventional financing

On scale I would be keen to meet like-minded investors who have 1) either already built sufficient scale and would like to levergae their team or 2) need to partner up to achieve scale.

I was told that the producers of the show got very annoyed because the work at one of the houses was going very smoothly and there was no drama, so they manufactured a "water problem" to get things a bit more interesting.

I looked at all the window manufacturers and decided to go with the Viewpoint window from Lisbon Screen and Door.

There are also opportunities to set up your own second units on acreage properties -- normally by moving a used manufactured home onto a permanent foundation.