i posted a few messages on the new home owner's forum that may? be helpful...at least i hope so. they are authored by sabrina. three sites i found very helpful have been
manhousingfoundation.com
starenergy.gov
consumersunion.org
and this site (both current and new owner's forums) is the very best!
i also recommend just starting at the top and reading, reading, reading. i have learned so much and that's made all the difference for me.
i too have researched custom, stick built, log, etc., and have proven to myself that the highest quality manufactured homes (usually built to ubc instead of hud) far outstrip everything else for quality, durability, flexibility of design and costs.
i"ll keep you in my prayers as you already have a truck load of "luck" from the other readers!

sabrina