The iron on type will not last through very many washings... and this quilt would also probably be handled a lot and folded, and this isn't good for iron ons either....I would go with the printed ones like the others have suggested :wink: I think you would be much happier with the final results.
Also, if buying a premade quilt, some fabrics don't allow the iron on's to adhere as well as others... You would need to look at the iron on packing for reccommendations.
This type of quilt would be very easy to make, and a perfect beginners quilt :D Even if there are a few oops, your dear dad won't care... he will be too busy looking at all of the pictures :D:D:D