the first time i took a full size quilt top to the lqs for advice on hand quilting it they helped me come up with a design and mark part of it then as i was leaving told me..."if you spend 1 hour each day hand quilting you can have a queen size quilt done in about a year."
I had trouble breathing all the way home...and loaded it up and machine quilted it in about 5 hours. ;)
since then i have hand quilted some small projects...it does not take all that long; with practice comes speed :)
to machine quilt (i do have a long-arm) it takes anywhere from 2 hours to 40 hours depending on the quilt and the quilting...stops and starts, color changes add time.