A question for the pros. I would like to eventually put a dog washing station in my laundry room. I'm debating between a do it yourself one and a professional one. I have been using the DoggyBooster for years but now I am ready for something inside. It breaks my back to use our tub and shower. Lol. I have room for a 49" one. Could I get away with a 24x40? That seems small to me. If I decide to purchase one, should I buy stainless steel or the Poly Pet Tub? Is there a place to get used ones? Thanks in advance for your advice!