OK. I went for the cheapo option and picked up a Harbor Freight 1500 pound ATV/Bike lift for $100. The vertical lift is only 17", but that'll be enough to change tires and other such tasks. Besides, it's red, so it'll go faster. It looks like it'll be easy enough to install a couple of brackets with pins. I'd have to do that anyway unless I picked the $600 version.
Time to get out the welder and the "welder's friend" (angle grinder) out of its cobweb-filled corner.