Koenig & Strey
As mentioned previously, you may want to consider purchasing a pre existing building and rehabbing it.
You may want to consider purchasing a building that a) needs rehabbing (low investment), and b) has a vacant lot adjacent. The reason is that you can potentially buy the vacant lot for as little as $1000 then knock down the building and build all new.
There are rules/regs that apply, i.e., owner/occupancy, but it's an option. Check it out:
Hope that helps and good luck!
P.S. If you're interested I have a few buildings with such lots. Call me.