Congratulations on getting the hang of it. I'm still not very good at the quilting part. I have a LOT of quilt tops that are ready to be quilted but I keep making more tops because the actual quilting part is not yet an enjoyable process for me.
The only thing that limits you with a domestic machine is the size of the quilt. Although I have heard of folks who have quilted a queen-size on a domestic machine. Pantographs are designed for long arms. But if you found one that you really loved, you could always transfer the design to the quilt top with a quilt-marking pen.