Well... if you don't need a waterproof light shelter, why take any tent at all? There are bugnets with zipper and floor for thirty bucks. A tent should be weatherproof or it's not worth carrying. It's a "shelter" right?

Yep, I've hiked with a lot of cheap tents. Never used one since I was a kid. One guy on a group hike strung up a tube tent on a nylon rope - the rope kept stretching, the tent kept flapping and keeping him awake. He took down the rope and used the tube tent as a ground sheet, for which purpose it actually worked better. Another guy brought a kid's spongebob tent. He busted the zipper on the first zip. Since it was nice out, he had no other troubles, but had to put up with bugs.