hoop house seems to be working

We put up the first half of a small hoop house yesterday. It's more like a small garden cover than a high tunnel because the flexible pvc was too flexible at 20 feet long. At 10 feet long, the hoops stay up on there own. I would like to try some longer poles, but not at too much more expense. The roll of 250 ft is almost finished and I am not buying another so may just stick with cutting the 20 ft sections into 10's. I have to figure out the covering because we will need three of these tunnels to sleep all of us. They are tall enough to sit up in but not stand.