i prefer hand quilting without a frame- just baste well before beginning...if you have not hand quilted anything before put together a small practice piece to try on first- a king sized quilt is quite a project to start with.
a lady at the lqs told me when i first started that if i spent 1 hour a day i could quilt a queen sized quilt in about a year....i went home & machine quilted my quilt-
i have since then learned to hand quilt and enjoy the process-but tend to only do small projects- large ones i machine quilt...unless i'm doing a quilt as you go type where i quilt it a block at a time then put it together...not to say you can not quilt a king sized quilt- just don't expect to get it done in a week or two.
there are many good videos showing how to quilt large (yes-even king sized) quilts on your domestic machine- it's not as difficult as you may think...just a thought...