Dan, This is unsolicitid advice, so take it FWIW:As a "car guy" for decades longer than I've been an E-T'r, if you are really starting a garaged car weekly just so it continues to start, I'd say you're doing way more harm than good. The majority of engine damage is done at start-up. Just let it sit (but keep the battery charged) until you're ready to drive it.
Thon