Well I never would have thought about trying to sew my own tent but then I came across this video of someone who did just that. Seems like a fun project if you happen to have some appropriate fabric around the house. Looks like he used some parachute material which can be made waterproof when treated with the proper coating so it should do the trick. I would recommend using a good quality sewing machine for the best results, check out these sewing machine reviews to find a reasonably priced one that will do the trick. Making a single person tent shouldn’t be too difficult but I think I will leave the construction of a four man one up the professionals.