Re: Minn Kota Endura C2 30 $99
That's what we use. Our first one did great until I hit reverse and the prop spun off in a flash and wobbled it's way to the bottom. Looked for the paddles. "Oh, I loaned those to my brother" the admiral says. Went to shore with a short kiddie paddle on one side and a dust pan duct taped to a boat pole on the other. Gotta love duct tape. Oh, the point is the parts will corrode in salt water so keep an eye on them. You can buy a salt water RipTide for about $400 or a Watersnake for about $150. SO, if this one folds, I'd hit Craigs list for another disposable.
We run for about 3 hours on a full charge so that carries us for 6 days of going ashore. And the oars are always in the dinghy. The only drawback is lifting the stupid battery.