DiY cat trees and catwalks

I just finished building the cat tree featured here for around 30 bucks. These will cost you from $100-200 if you buy retail, and you won't get anywhere near the quality. The leopard-skin carpet is the bomb, got that at a remnant store for 10 bucks for a 3 feet by 30 foot chunk of it. The tree is constructed of a 4X4 fencepost, and 3/4 inch CD plywood for the base and landings, the rail for the top is 1X2 white pine. The tree is robust, rigid and stout, is screwed to the floor at the bottom and to a wall stud at the top. It's not going anywhere, and doesn't even wiggle when my cats climb on and roughhouse on it. Everything is "screwed and glued" and there are NO staples used on the carpet. I designed and built a little carpet stretching tool using more of the 1X2 and a carpet tack strip. This enabled me to stretch the carpet as the adhesive dried, and eliminating the need for staples which can definitely hurt the cat if he gets his claw stuck in one.. The catwalks are 3/4 inch CD plywood with more of the 1X2 pine boards as a safety rail. The walks are fastened to the studs inside the catwalks, where we can't see from the ground. And yes, that hole near the end of the video goes right through the wall! I have around $200 total in this stuff so far, including two other cat trees and all wood, hardware, glue and urethane finish. Feel free to send me a message or leave a comment if you want more information.