What are appropriate social norms here between low and high Henry earners?

I am flying to meet my friend and their kiddo in the town they live in. For reasons I won’t go into, we need to rent an Airbnb. The dilemma: they have offered to pay. The thing is we make 4-5X more than them. For us to pay means nothing but for them it could mean a whole lot more. They’ve offered so I am trying to graciously accept but insist all other expenses be on me. My spouse thinks it’s rude and we should pay. Thoughts?