Depends on what you are looking for. I have the same material on my boat. I cut it to size and sew it on a regular sewing machine. I make a new one each year to year and a half. I am just now making one. I started cutting it yesterday from the old one. I pay about $30 for a 20X12 foot tarp, not much for the tread and about two hours of cutting and sewing. Once you get the first one done, consecutive ones are easier with the pattern. You can mess it up and fix it easily as the cost is so reasonable.

If you want a cover that will last about 5 years at one time you will need to spend pretty big money on it, like the one you mentioned.

Another thing you can do is make one out of the plastic tarp and make the second one, after you have lived with it and like it, out of a canvas tarp with the first one as a pattern. About $100 for a 20X12.

Later,
Dan