Seeking modular manufacturer/low cost build - Flagstaff AZ

[Rowdy B.]

I want to put a 40ft x 40ft addition onto a property in Flagstaff, Arizona (zip 86001).  I have fixed/flippped/built additions for seven properties, and have either done or been involved with nearly all trades.  I am searching for the lowest cost method of doing this which could be completed before the frost hits in September/October.  I am capable of doing the framing myself, and getting subs for everything else, but would prefer to focus on my day job and have a life for the next few months.  That being said, this option does seem to be the only way to get the job done within my budget and time frame.

I have spoken to several general contractors in the area, but all have indicated that they are either not interested or could not get started for at least 3 to 6 months (building boom here).

The most appealing idea for me at the moment is modular.  In particular, I would like to find a manufacturer that is able to produce a two-story custom modular building for a reasonable price.  I have a rough design in PDF format.   I have been in contact with all of the major manufactured home builders here in Arizona, but none of them do two story, and all of them now have at least a 5-6 month build time.

I am open to other options, and have been doing a lot of research on new building methods and materials (such as SIPs), but none seem to match my budget and time frame.  One other challenge here in Flagstaff is finding reasonable quality workers.

If anyone has any information they can share, I'd certainly appreciate it.

Thank you,

Rowdy Bristol