Bigweights,
Good question- I would like to know too! But, it does vary widely by region. But I can tell you some of the costs where I am planning to build my place. Cattaraugus County, NY. It will be a 24x40 footprint, so costs should be close.
475' Driveway $5700.00
Electric Service $3000.00
Foundation
excavation/drainage/backfill $5000.00
Poured footer/8' walls $9000.00
Basement slab floor $3700.00
Drilled well 50' deep
(well/casing only) $2000.00
Sand mound septic $5300.00
Permits $ 900.00
Total so far $34600.00
Now, around here, you can get a basic structure to the "dried-in" stage for around $20/s.f. Labor and material. So if you go this route, you're looking at around $52K or so, minimum with no interior or exterior finishes. Now, I know this isn't DIY, but you aren't going to do EVERYTHING yourself, right? I know if I tried that, I would never get to enjoy it!