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And funnily enough, even domestic tourists still have to pay big bucks for a stay: https://genshin-impact.fandom.com/wiki/Pumayna
The cheapest accommodations are 20k Mora a day, with no discounts for families. Food and souvenirs are not free, either. A family of five, staying for four days and completely skipping on souvenirs, can be expected to pay 500k Mora.