Pete, I own both, a ZT and a garden tractor. If I had to keep just one, it would be the ZT. It cuts twice as fast as the tractor and gives a much better cut. If you only have a 200 ft drive way, I would not buy a snow blower to attach to a tractor. Use a high quality walk behind or get a plow guy, which will probably cost you fifty dollars just to do your drive.
I don't mind spending money, I mind wasting money!