I’d like my kitten to have something to climb on, but am on a low budget. There are plenty on Amazon but very mixed reviews. I don’t want to really spend more than £50. Is that unrealistic? It needs to be sturdy enough for an adult cat that weighs 4.5 kg as well. I don’t care about the colour. Just something they can have fun on. I live in rented accommodation, so can’t fix it to the wall.