Also if a tenant calls for a maintenance ticket, but there is nothing wrong (tenant did not believe the A/C was cooling properly), then that is a tenant bill if the A/C system is operating within manufacture Specifications.2. 

Welcome Jason, I'm an RIT alum (Manufacturing Eng 2008).

This is your primary source for investment opportunities.Next, visit all the local manufactured home dealers.

Just having a high school diploma will most likely not lead to a high-paying job due to the decrease in manufacturing in the USA.

Add to that the allure of California, great economy in so cal, the ocean, amusement parks, medical centers, high tech, manufacturing, entertainment, recreation, sports teams, universities, etc., and it all creates a strong demand for housing and commercial space. 

In my area modulars are often lumped in with mobiles and manufactured homes and disallowed by covenants.

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?