Building a garage, cost $$$$

I have seen, in the past four years, sheetrock go from $4./ sheet to $12., 12-2-Romex go from $29/250ft. to over $100/250. Deck screws went from $1.99/lb to $4.99/lb...I too am attempting to get a workable price on an addition to my daughters house and a garage. Codes / permits also add costs, along with snow load calculations. And, since my property is near the river I have flood plain and hydraulic issues, not to mention the wet lands issues we've had. I've gotten prices from $20,000 for the addition to $57,000 for the same work. Thats with me doing the heat and electric. Building costs are out of site. With liability insurance costs, workers comp, commercial vehicle insurance, and $40 an hour labor, what cost $5000 five years ago is now more like $25,000.-$35,000. Five years ago, around here, you could have bought a house on an acre or two for about $90,000.....today the same house is $225,000, if you can find a decent one.