I have concluded that the vinyl sign banner material will not be a great choice of material due to its lack of breath ability and as was previously mentioned, its tenancy to become very hot to the touch under direct sunlight. The features that were attractive about the banner material were that its waterproof, durable, and not too costly. As well, a big benefit is the ability to use welded construction rather then sewing. These heavy industrial type fabrics usually cant be sewn with a household machine, and if they are sewn, need to be later sealed to remain waterproof. I'm convinced welded construction is the way to go with an RTT of this design, especially if I am to attempt to construct one myself.
I have done some research into the likelihood that this could be done with a reasonable amount of practice and no special(expensive) tools. It appears that it could be according to this video.
I have looked into other fabrics that could potentially be used for this design, and found that heavy weight Cordura could be a possibility. It is strong, waterproof, somewhat breathable, and can be welded.
I will continue to research this idea. Thoughts, ideas, suggestions, and constructive criticism is welcomed.