I think there’s a difference between living ostentatiously and wanting to live comfortably. The first is a form of bragging (which can bring about ayin harah, jealousy, etc).
When we see a goy living in a beautiful home, do we say “dirty goy who steals and owns all the banks, media, etc”? Of course not. Those thoughts are pure anti-semitism/illogical based on jealousy. I’ve heard of rabbanim who have homes that look “eh” on the outside and really beautiful on the inside. To me, that makes sense. However, once a non-jewish delivery person or technician walks in, you’re inviting jealousy once again. So, where do efforts to keep ones wealth hidden end?? I think we have to know whether we do/have things to incite jealousy (some do) or to make our lives pleasant and comfortable, and not base decisions on other people who have issues.