My own FM station

I’m wondering if it makes sense to broadcast my Halloween background music this year via FM, rather than running speaker wires all over the place. Ramsey has a lot of FM kits. I’m not sure what the legality of running your own FM broadcast is, even if I just limit it to my yard. The rules for Low Power FM don’t permit individual stations. Sites like Radio4All give a lot of guidance tho on how to set up a station.