I feel your frustration, I have the same when it comes to the actual quilting and I have a lot bigger throat space on my machine than yours, that I can't even image what my frustration would be with a smaller space. It is doable to quilt though, because I've seen some absolutely gorgeous quilts on here that have been quilted on just a plain old sewing machine, I don't know how though. You have done a beautiful top and I would hate for you just to hang it up and forget it. My suggestions are: hand quilting, have a long armer quilt it, tie it, or get a machine that has more throat space. You can also try the spray basting instead of the pins, so that you don't have to stop and take them out as your quilting.
There are several long arm machines that are priced for the "home", or technically they're "stretched" machines, one is the Bailey, which has a good reputation. Keep in mind though, that they do take up a good bit of room.