Oh, Chuck! If only I had the entire day...
Let's see:
1. A Nano18 for $8.00.
2. Freely downloadable BASIC compiler, BasicAtom 5315.
3. A USB Nano Programmer, $17.
4. A breadboard, $20 at RadioShack, $5 or so on Ebay.
5. Pre-stripped wire kit for connecting things together on the breadboard. ~$20 at RadShack, cheaper on Ebay.
6. The power supply is a little tricky. If you can get your hands on an old USB 1.0 power supply, 5V/2Amps, remove the connector and figure a way to connect to the breadboard"s power rails. Instant 5V.
7. Obtain miscellaneous parts: Power supply capacitors, pullup resistors (10K, 1/8th, 1/4 Watts), switches for reset and applications, A couple LEDs and suitable current-limiting resistors (390 Ohm is OK), and probably more but doesn't come to mind.
OK, so after paying taxes(?), paying shipping costs (or the time to chase the parts down), modifying various items, you might just as well buy the Nano Development board for $50 (before Shipping/Handling, usually anther $12.95 with UPS Slow) along with the Nano18 (skip the Programmer, board has USB programming port) and do it all in one fell swoop.
That looks like:
$50 for the Nano Board
$8 for the Nano18
$12 to $20 for pre-stripped wire kit
$13 for S@H (UPS ground)
$tax unknown
$83 total without tax and your wires kit cost.
If you have a well stuffed junk/parts box, this will be less. You can always buy the four conductor 22G bell wire at RadShack and seperate the wires, cut them to a couple handy lengths, then strip both ends to 1/2", and use them for your connections wires. You still have to come up with a DC wall adapter to power the board. Preferably 9 - 12Vdc, around 400 - 500 mA.
Hope that helped.