I personally wouldn't ever buy a boat with a single axle trailer. That's just too much weight on 1 axle. It would have to be a heck of a deal for a single axle, and even then I would swap tires out to 10-14 ply tires immediately, so your out $2-300 right there. So for me the $2k is worth it on the axle alone, autowake just adds to that decision. Should you ever sale it both of those items will make it easier to sale as well.