I rent a LA to quilt my big quilts. I mainly do all over simple designs, loops, flowers and the such. I have my quilts on a zipper and ready to go when I get to the studio, from loading to unloading, it takes me about 3 hours to quilt a queen size.
Examples:
My Bargello is a 102" square. I quilted it with just wavy lines across, 2.5 hours.
http://www.quiltingboard.com/t-110136-1.htm
This quilt is 80" square, quilted it with loops and flowers in about 3 hours.
http://www.quiltingboard.com/t-114058-1.htm
My OBW is 54 or 55 inches, quilted with loops in less than an hour.
http://www.quiltingboard.com/t-111130-1.htm
From my experience, renting the LA has been a great investment, well worth my time and money. And just so you know, I don't consider myself fast at all, not do I consider my work that great, but it is the best I can do with what I have.So I'd say go for it :thumbup: