However, sincer there are not many of those in Marin, or probably, anywhere, I also remember seeing an owner has to get special approval from her town / neighborhood to build a luxury modular home; and I am talking about LUXURY home, I wonder how much statistics are out there for comps.
1. Accessibility - You are sending a fully made house to your jobsite. Dont let the manufacturer tell you they can do it, without doing your own research. If they can't fit your house down your street there is nothing they can do and they will keep your money and you will lose your house (unless you get a helicopter to bring it in).
2. Location - In lower labor cost areas like Philadelphia stick framing can make a lot more sense $$$ wise. I can build a 3 story house at a high construction grade with finished basement and over 2400 square feet for under $100,000. However stick framing means you deal with many trades and its easy to find unscrupulous trades who will rip you off or not do the work/... Make sure you're built for the stress.
3. Timeframe - Modulars take a few months to create. There was huge backlogs at the end of last year that could seriously delay your delivery date. Right now it is a good time to order modulars. Like Chevy and GM, they have gas guzzling trucks and they are trying to give them away, modular builders are doing a similar thing in this tough market.
Call or email me if you have any questions or want advice.
Your profile and question do not say where you want to buy.
On our MLS in Marin,CA; we have a special category for Modulars homes and we do comps specifically for those. You want to be careful of module homes because there are other fees associated with that.
My suggestion is for you to talk to a Realtor in your local area. They will be able to not only provide you with a comp for modular homes, but the trend in your area - whether Modular homes will be good investment in the long term.