Puppy drowning in mud.
I've setup and run a couple of small radio stations, please forgive my dislike of DAB, but it is not fit for purpose.
1) DAB is not popular: If you're a small station, you'll need listeners to attract advertisers (or demonstrate success to your sponsors and donors).
2) DAB is expensive! To receive and transmit. You won't believe how expensive it is to get on a DAB mux.
3) DAB sounds crap! There's no argument, DAB sounds like a puppy drowning in mud (at times).
FM may be hissy, but if you employ some reasonable compression to the dynamic range, it sounds great in a car (or at home).
DAB just sounds crap, even the DAB+ nonsense, which many radio owners can't receive, thanks to their radio not being upgradable.
If you want to broadcast in the digital area, encode your output to for streaming, and compress the dynamic range to compensate and make sure you test the output with differing types of audio content. Listeners do not want to hear music that sounds like a 12yr old's YouTube 'rip'.
Sorry for the rant.