So now that it is so easy to just grab a USB FTDI232 (module or cable) off eBay and have a decent ALDL cable, is it time to move on to the next step?

Would it be as easy as using a MAX232 tied to a BT HC-05 module and have a cheap BT ALDL device?
If I'm barking up the wrong tree feel free to make alternative suggestions.

I know commercial BT OBDI ALDL stuff is out there, but I'm a cheapass + I enjoy DIY stuff.

I have forgotten way more than I remember about electronics, and would like to start playing around again.
Knock all the dust off my soldering station, etc. Pretty sure I have some MAX232(s), and I know I have some HC-05 boards.