I don't see the problem. They are not the first influencer type people to show the houses they bought on YouTube. I watch anime reaction channels and you can see their recording areas change over the years as the YouTube money comes in and they eventually buy a house.
I bought a house back in 2017 and I have plans to make my study/office room into an "anime room" just as soon as I have the money for nice displays. My waifu figures and posters are ready to go.
How is this different from gaudy video game merch on display?
What you described is far worse, but you do you man.