I want to make a 5x6 cobana using pvc pipe for a frame, where can I find plans for this?

It is going to resemble those you see in mexico on the beach or in florida, like a changing room.

sounds like you have the plans already in your head

Try using copper pipe instead of PVC it will hold up better in the long run and if the PVC is running a span of over 4 ft then it gets very shaky. My best advice would be go gt your pipe and fittings, go for it.