The most cost effective for a 22' would be a Schaefer Snap Furl CF-500 (which takes a #5 luff tape) or a CDI FF2 (which takes a #6 luff tape). I highly recommend getting a UV cover built into the sail. A good hoistable cover has laces to prevent the cover from flogging to death, and will cost more than a built in UV cover.
The Schaefer Snapfurl uses the boat's genoa halyard. The CDI has a built in halyard. The snap furl is, IMO, the functional equivalent of a Harken Cruising Furler. The CDI is very KISS.
Both of these furlers have plastic extrusions, so they are very trailer-friendly. You won't damage one of them during mast raising.
The one caution is the you MUST store them carefully when the mast is down with the furler attached. Any big sags that are left for weeks may cause a permanent deflection in the extrusion. For off season storage, the best thing to do is take the furler off the boat and store it separately on the floor or in a tube, or hung from a rafter.