I consider myself a competent quilter, but I'm sorry I don't believe a completed large top in four hours. Just the cutting alone, which has to be exact or the points won't line up, will take some great amount of time. I think $650 is on the low side, but you will ultimately have to decide after you've gotten your materials together. I'm happy making projects for friends and family. Don't know if I'd consider a special request or not, have to wait and see if that ever happens. Good luck to you in your endeavor.