Mate my recommendation on swags is that a cheap swag is false economy. Yes you can get a cheapie for $150, but it will probably only last you a year or two, and will fail in difficult conditions such as high wind or heavy rain, the stiching will start to come apart, the waterproofing will fail etc, etc.
Or you could spend a bit over double that price, and have a good quality product that will see you through ten years or more in every weather condition.
So if you can hold off a bit until you get the money to get something quality, you will get much more use, and value out of it.