I would love to have one of those real wood ones too, but I spend all of money on cat food, litter and vets......so, I have an Armarkat tree. I have a $150 model that I got on sale, for $80 through Amazon, shipping included. I have had it over a year and it has held up surprisingly well. My cat Stephano zips up and down that thing 100 times a day, and it takes a beating. Is it the bests made cat tree...no. But I have had FAR worse. Someone gave me a "go pet club" small tree once, and at least the one I had was the flimsiest piece of junk I've ever seen. If you read the reviews on Amazon or Wayfair, you can find one that is decent, like mine, or you can get a really good one for more. If I could afford it, I would buy a better one. I do have a pre-assembled one from Petsmart, it is definitely more sturdy than my Armarkat, but it was $140. I've had it for years though, and it's very strong.
My cats love them though. There is one by several windows and there is always a cat perched atop one sunning themselves or looking at birds. And it gives a house cat some much needed exercise, running up and down them. I managed to get an Armarkat on Wayfair for $30 once, a few people on here got the same deal. It was a big tree, but I have not seen a deal like there since. My daughter's Armarkat tree takes more of a beating than mine does, her cat is a moose, almost 20 pounds, and he flies up and down that thing all day, and it has held up very well.