Hi Doofus! (Can I call you Doofus?
)
Glad to have you, and happy to see you've latched onto driving mods as the first way to improve your fuel economy. Depending on how hard core you want to go, that's the path to the largest gains.
Congrats on munchkin #2! And as for the cost of the ScanGauge, it'll pay for itself, so the sooner, the better.
Another option is to keep an eye on eBay. I saw an original ScanGauge sell for a bit more than $100 a week or so ago.