I started off with a Simplicity sewing machine back in '92 (around $200). I sewed clothing home decor, etc. Got into quilting, bought the walking foot and big foot. The throat was only like 5". I, indeed, quilted with it. To do this though I ended up using low loft poly or warm and natural. Something that when I rolled up the sides ended up being more managable. Didn't to real fancy, but was able to do more than SITD. Just takes longer. Just go slow.
Now I have a Janome 6600 and love it.