Location matters— no idea where you are so no idea what the prices are like in your area.
Each long arm quilter has their own formulas for pricing. Not all long arm quilts have machines with ( built in designs) I’ve been quilting for 15 years for customers, I do hand guided free motion quilting. There is a list here on the board of long arm quilters arranged by location. Maybe you could check the list & contact someone in your area to see what prices are offered. I know here the quilters who have the computerized systems that digitize designs charge about double what those of us without those systems charge.