I don't know if there is a Metal Mart in Ark or not, but I just bought a 30 X 40 with 12' eaves (complete bolt together) for $6195. This didn't include any doors just one framed 10 X 10 opening in an end wall. I added enough extra purlins, square tubing, and tin to build a 23 X 40 lean-to carport for the front of the shop and a small 12 X 20 lean-to for the rear of the shop. In addition I got a 3 X 7 walkthrough and a 6 X 7 set of french doors for the rear. I got all of this and all the needed trim and fasteners for $10,000 (sales tax and shipping included). I chose to forego their roll-up doors for some sectional overheads instead. I am going to pay $870 for a 16 X 8 and a 10 x 8 (sales tax and installation included). The slab is going to run about $4900 and insulation will be $1200. So for about $17,000, I will finally have a decent shop to work in.
Now I just gotta figure out how I am going to fund the wiring of the dang thing.
If you are on a tighter budget, you could save some by going with 10 ft eaves, ditch the carport stuff ($2100), and go with smaller doors and no insulation.
If you are thinking about doing this, I would jump on it pretty quick. The manager of Metal Mart here in Waco told me that there was just a slight increase in his kit prices at the first of May (I bought mine at the end of April), and he foresees a more significant hike at the end of May, so I wouldn't delay too much. He told me this after I had already bought my kit, so I don't think it was a sales pitch.