I dont see why someone would throw that away. Id sand that down and mix a little wood stain with a little hydro dipping, cut a wood basball bat down the middle and put a half on each side with some more hydro dip...fuck that would be some kids dream dresser for like 50 bucks and some elbow grease......unless they hate baseball, lol.
But seriously, that is an awesome find for what you are using it for, let alone how much you paid, or didn't pay for it! Especially for a clone/mother station because light gaps aren't usually an issue. Maybe get a shelf in there towards the bottom so you can have your clones going there with a couple little 2x2 t5s and a dome, and then optimize the rest of the space for a mother and that 150 watt light and it keeps the hottest light up top, and you can vent out the top as well, intake in the bottom to keep the heat rising the hell out of there, might not even need a vented hood.
Just make sure the shelf is sturdy because you are going to want to not only hang lights from it, but also your mother(s) will sit on top of it as well. Dont let the shelf be flush all around and then you wont half to worry about airflow going out the exhaust, just have to cut an intake out the bottow. I'd us a 4" inline to vent it, maybe get a controllable 4" and then a fan speed dial thing and then you can control the temps in the cab by simply increasing or decreasing airflow. With hid lighting you can leave cabs like this in the garage where its cold and they will easily stay at or above 75 and still require some exhausting after heat builds up. Titan Controls, Sentinel, etc, lots of people that make nice gadgets like environmental controllers and whatnot, makes it easy. Maybe a little clip fan in the corner to keep things moving. Little cabs are fun, easy to over do it but I've always enjoyed them. Big rooms are just work.