RX-7 is a nice toy, but really not practical transportation. Sounds like a wise choice. Good luck with it. With something else to knock around in you will have plenty of time to fix the RX-7 up the way you want it.
Interesting factoid. I visited my old boss and he asked me if I could get him another oil fill cap for one of the Mazda MPV V6 service vans. I looked at the hole in the valve cover, walked over to my CRX, flipped open the storage compartment, grabbed my spare HONDA oil fill cap, and spun it right onto the MPV. So Honda and Mazda really have more in common than you might think.