Can you please give me some tent purchasing advice?

I am looking to purchase a tent for a “backyard” camping trip for myself and my child, at the yard of another family. I am not a professional camper, so I am not looking for the mother of all tents, but we may go “real” camping in the future so I would like a decent tent we can use again.

I came across a small tent at Kmart, for about $30. I decided to check my usual sites: Amazon, Costco and Walmart. Walmart had a 12×8 one for $55. Amazon has some decent ones, similar size and price. I like the idea of approximately 12×8 in size, in case we want to bring other people with us in the future.

My questions are: are tents a lot cheaper after July 4th? I know Amazon and Walmart usually have great prices anyway, so no need to wait if it’s not going to make a difference. The tents at Costco are bigger and more expensive than we need.

Are there any special features I should know about that are good for tents to have?

The one I am looking at on Amazon has a tub bottom and is about 60 inches in the middle, big enough to stand up in. It’s about 10×7 and $55. It’s by Suisse Sport.

There was one at Walmart.com that was 12×8 and $55, by Wenzel. However, it had some bad reviews due to zipper problems. The Suisse Sport one at Amazon had no real bad reviews. ,