Those of you in clubs should consider buying a walking foot sewing machine. There was a company up in WI selling new ones really cheap (Consew machines). They were selling through E-Bay.
You can make covers and upholstery and save a ton of money. The best material for covers is Top Gun, but it is not cheap. Sunbrella is a popular material but will not last like Top Gun. Check out the cost of the material alone on the net. I have not found anything else that will stand up to the FL sun. I also use UV treated thread, it's called Sunguard. I also use a leather of vinyl liner in any area that might have an abrasion problem.
No, I don't sell covers, I would have to charge too much the way I do them.
Jim