The easiest would be to unsubscribe from two of them. Or even better, if people could stop cross-posting.
Except cross-posting has a purpose. In that example, one of the posts was to beehaw while another was to lemmy.world. Beehaw defederated from lemmy.world so users on beehaw are only going to potentially see two of the three cross-posted posts. If they also defederate from lemmy.ml, those users would only see one.
So yeah, the solution is to unsubscribe from two of those communities because they're essentially 3 completely different groups that just happen to have the same name and general focus. Either that or just get used to it.
What do you consider "expensive"? And like others asked, where are you going to be commuting to, and what do you consider "too far"?
I don't know if I'd agree with the people on Reddit who told you to avoid Tacoma. It's certainly cheaper than living in Seattle itself, if you can deal with the commute time. Also keep in mind that Seattle is one of the safest large metro areas in the country, so pretty much everywhere is "safe" compared to other large cities.