Litter pans are a problem. Especially when you have a large cat who can't fit in a small litter box and a dog who considers cat poop a delicacy. It's been a struggle to find a commercial litter box the cat can enter and the dog can't.
On average, the cost to have an above ground pool deck professionally installed can range anywhere from $2,500 to as much as $8,000. The costs really come down to the type of material being used, the size of the pool, the design and contractor building the deck.
1 The next option is a fiberglass pool. Materials alone cost between $10,000 and $30,000 based on the swimming pool size. The price including installation (without any sort of deck or patio) is $20,000 to $40,000.  The most expensive kind of swimming pool is one made of concrete.