I'd go the guide scope route for now, considering the short focal length. Try to make sure the your guide scope is solidly mounted and pointing at the same field as your imaging scope. Use high quality, strong mounting bars like Losmandy style over Vixen and try to avoid using cheap mounting rings with plastic screws for the guide scope. If you can, use solid rings and spend some time shimming and adjusting the guide scope to get good same field coverage as your main scope.
Oh, and remember, you get what you pay for. Buy quality gear.
