As others have said, don’t use wood as it smells. Also, although everyone thinks the biggest cage is the best cage, and of course an animal needs as much space as possible, only buy as big a cage as you can manage to clean frequently and efficiently.
Sometimes hamster cages with a lot of plastic pipes and tubes, although appealing, are a nightmare in terms of hygiene when the animal pees and poos inside the pipes, and you constantly have to take them apart to keep it hygienic. Better to have a large but simpler space that is easier to reassemble afterwards.