Should I get a gaming laptop or a gaming desktop PC based on details below?

So I already have one regular laptop and desktop for regular uses. I want to get a computer for gaming but I rarely leave the house.

The times when I do leave the house and stay somewhere for a few hours, or stay at a family members house like my sisters overnight or for a few days I get incredibly bored and want something fun to do instead of sitting around watching boring TV shows with them or talking to them about things I'm not exactly interested in.

Get a gaming laptop now and get a gaming desktop PC later down the road.
Get a gaming desktop PC.
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Should I get a gaming laptop or a gaming desktop PC based on details below?
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