Hey Waldo,
The Stumble Inn thread is a good thread to review for a build on a budget:
http://tnttt.com/viewto ... tumble+inn
His build was less than $500.00
The Fred Sanford Build is another good thread for a build on a budget:
http://tnttt.com/viewto ... ed+sanford
Obviously, the more supplies you can scrounge or find, the less expensive it will be.
For me, attending to the project on the weekends when I could, I found I used Home Depot/Lowes for many of the parts, due to convenience/availability when I needed them. This probably resulted in my paying more than I would have, if I had bought the supplies elsewhere, or I had more time to look for salvage/used materials. I also splurged on a few specialty parts, like the Fantastic Vent fan, "better-than-hurricane" hinge, the crank out windows. On the other hand, I should also note that I had a couple of areas on the build where I caught a break.
Regarding the trailer, I bought the utility trailer new but on sale, from Northern Tool. Folks that start with a used trailer, old salvaged pop-up or whatever, probably start out way ahead not buying a new trailer.
Using new parts/wood at mostly retail, scoring a bargain here and there, I think a frugal build $1500 is possible, but costs can easily run more.
AL
