Good topic. I am finishing up a King size quilt for our bed and that thing is huge!! I decided to have it machine quilted b/c it's just too big for me to tackle. I hand quilt up to full size but that's it. I never thought I would get anything machine quilted but I've changed. There are so many beauties and I also have more time for more projects! :D
A little tip though for finishing one that you started: try to set aside a bit of time every day if possible to quilt- even if it's 15 minutes.. I've done this and little bits add up to a lot of quilting. Then you realize you're almost done!!
I also make smaller sizes but mostly bed quilts.
Since I joined this board I'm gaining confidence to tackle some machine quilting on my own but that big one is going out!!! lol
Good luck!