I would buy the biggest piece of land that I could, somewhere with trees and wide open spaces.
I would construct large buildings with heated floors.
I would go to every mattress and furniture outlet so I could find and buy beds and couches and comfy chairs.
I would hire a full time Vet.
I would hire a special cook.
I would buy rope toys and squeaky toys.
I would buy rawhide's and kong balls.
I would buy catnip and rubber mice.
I would buy cages for hamsters and bunnies.
I would build paddocks for horses and llamas.
I would create a home for every animal who needs one and would make sure that none of them are ever turned away.
If I won the lottery, I would create heaven.