My best advice, don't go cheap. Good tents have aluminum poles, not fiberglass. They also have full coverage rainflies and real no-seeum mosquito netting. If it has fiberglass poles, don't trust it in cold weather (fiberglass becomes brittle and stiff and cracks), in winds over 30 mph, on terrain that isn't flat, or under any snowload. Full coverage rainflies are required because in rainstorms, rain doesn't fall straight down when it gets windy. If you touch the sagging nylon sidewalls of a cheap tent in the rain, it starts leaking, which is also why you want two layers of fabric between you and the elements. Cheap tents go cheap on mosquito netting so you are going to get eaten alive by bugs and will end up not using the cheap tent much because of this. If you don't need protection from bugs and only camp out on sunny, windless days, go ahead and buy the cheap tent, but then again, if that's the case, just sleep outside. You don't really need the tent. The tent I've been using lately is a North Face Stormbreak 2 tent which is $160. It has aluminum poles, a full coverage rainfly, real no-seeum mosquito netting, guylines on the fly (strengthens the tent in high winds), and multiple pole crossings (strengthens the tent in wind and under some snowload). Also has decent ventilation so it doesn't rain condensation from my breath every morning (this is a problem you will definitely have if you wrap a cheap tent with a tarp). A $3 6 x 8 foot tarp from Walmart makes a decent footprint for the tent. Hammock camping would work for your price range. Walmart has a decent hammock with mosquito netting for around $40. A cheap tarp will cost about $10-$15 at most. With a hammock, the trees are your poles so it won't fall apart and blow away. It is off the ground and under a tarp, so you stay pretty dry even in a flood. It would have good ventilation so no condensation problems. So, to summarize, go the hammock route or get a real tent, not a cheapo.