I paid £300 plus pounds to do a 3 day class at the NEC Birmingham UK.with a named quilter. The sewing machine was provided plus irons and boards. We had to provide all our own fabric. Enjoyed the company but would not pay that high a price again. Done it once and found out it is not worth the cost.
Are you going to go for the experience then if you can afford go for it but if you have to be careful with money etc think very hard as to what you want in the end.

Too expensive for me as I don't finish the item ...............have taken classes from Pat Holly and Sue Nickels didn't cost that much true they didn't have to fly ..........used to take classes at the Sewing Expo, not all dayers but that seems like a lot.
Purchase the book and you would probably read the method she is teaching.......JMO