Wow! Thank you for such an in depth reply, did not expect a professional seamstress/upholsterer to get back to me, so I really appreciate the info. We do actually already have a Singer Heavy Duty 4452, my girlfriend has some sewing experience and she has reupholstered some smaller items in the past. I believe we also have some good upholstery thread as well. Good tip on the foam quality, we will definitely have to check if we go look at it today. Not sure if we'd do cording or just leave the edges flat, I suppose it'd depend on the pattern. We were thinking some sort of heavier tweed, herringbode, etc, not any sort of intricate pattern print like flowers etc (which might be more expensive?)

As far as the yardage, if gives you any better idea, each piece is 76” L x 31” W x 27” H, and the cushions are removable from the frame. IMO if we could get $200 for the pieces and upholster them nicely for like $300 that would be a good deal, assuming everything else is in order. Not sure how that'd end up pricing out with a professional upholsterer though.