Considering the price of a Pi4 (about a 100 bucks...?), which will be the only expense, you could still give it a try... it can do local files, internet radio, BT, and also Deezer (until the deezer-connect API kept alive and maintained by the Deezer guys, of course). You can use HAT DACs, as well as USB DACs, which in my opinion is the best choice... but to try it, the headphone jack is still a quick-and-dirty option, too.
Nevertheless, the WiiM seems to be the no. 1 choice all-around; well done.