check around your area local quilt shops, machine dealers- you don't disclose where you are so can't help--but many shops that have/do quilting also allow you to take a class to learn to use the long-arm then you can rent time and use the machine to quilt your own quilts.
when i bought my machine i took a class at a lqs that was $50 for the certification class- once certified you were able to rent the machine for $20 an hour to quilt your own quilts.