one wand per carhacter.
it isnt really lore friendly to have difrent wands what they could implement is the discarding of your current wand and then getting a new one
People do have the possibility of having other wands.Ron and Neville both bought wands, when it was that theirs got destroyed and Voldemort had his own wand and the elderwand at the same time. There is nothing that stops you from having multiple wands.
People can have multiple wands, for example, if they want to gift other people. And it would just be more positive, people have money and can buy whatever [except for pensieves]
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