Instead of spending hard earned cash on expensive kitty condo's make your own. Use boxes, paperbags, and toys to create your cats own little heaven. It's cheap and you can add or replace parts as you want with no additional cost.
I usually use the full box's that the canned cat food comes in and any other box's I can find. I also use the bags cat food comes in to make the crinkly tunnels that cats love. All you need to hold it together is some tape and patience!