I'm for cheap; but there is too cheap
And I know from experience, being on a campgrounds after a cloud burst around two or three in the morning. The hollering was unbelievable. I remember getting woke up and a fella had some six inches of water in his tent. I was dry, I told him, when he woke me up.
If you go cheap, make sure you spray some silicone spray on the tent, to make it waterproof. There is a probability, that they went light on the waterproofing with the cheap tents. Many a career was ended in tenting, I believe, when the rains came at 3 A.M.