I bought land about 3.5 years ago and had plans to build. The economy crashed shortly after I bought it and it took me right at a year before my house sold (for much less than it would have had I listed 6 months sooner). Anyway, once sold and settled into my rental house, I worked on the builders to get my quotes together and they had mostly come down. The one I chose was going to build my custom home for about $87/ft2. This was hardee/cultured stone exterior, hard wood floors, custom cabs, granite, etc. Very good price IMO as most were $120/ft2 not too long before and that's what the house should have appraised for. Had the plans appraised as part of the loan process and low and behold, the appraisal came back $30k less than the cost. Wife and I did some soul searching. The difference in my down payment and the additional $30k would have had us with zero savings left pretty much and then not knowing would the final build appraisal drop even more leaving us with a larger deficit at final closing. We decided to not build at the time.
We looked around a good bit and found a foreclosure that was 2-1/2 years old, not quite what we were going to build, but close. 2,433 ft2, about the same. On a smaller property (3.3 acres). 4.5 miles from our property we were going to build on. Similar construction, except vinyl and cultured stone instead of Hardee and cultured stone. Anyway, we bought that place for $70/ft2 (including the property).
As you can see, in the Southeastern US, rural prices are much lower than other areas (except maybe some parts of Texas which are also very reasonable). This is probably why M7 and others on here are so shocked about prices in Canada, NE US, California, etc.