Make it a business deal and not one of friendship and get it in writing or the trade will never be a fair one. I know from experience how trainers work. Schedules change and once they think you know what you are doing you don't need them and they pick up new clients and because you are not paying cash your importance goes to the bottom of the list. That is just the way it is. For trainers time is money. I know this because I've been there.
I've seen lots of friendships ruined over such deals. She is not a close friend so your importance may be less than required for such a trade. Sorry to be so harsh but experience is a the greatest teacher.
Your base price for a quilt should start at 400.00 bucks. Don't underestimate your worth.
Or I could be totally wrong.
peace