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?

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.  

And city was also known as a hard working manufacturing city, but many of those large organizations have long since left Rockford.

What type of product is being built in each submarket (e.g. distrubitution vs. flex vs. manufacturing etc.)?

A $100k purchase in King or Pierce county seems to suggest a manufactured/mobile home.If they need some cash now and you need some time to figure out your financing for the entire purchase, a lease option may also work (instead of seller financing), and you can give them some money up front as a deposit to help with their cash needs.

Hospitals, manufacturing tied to GM, colleges/universities, and government jobs.