Brecon Beacons with a toddler

[S10GTA]

Having just returned from a weekend in North Wales I'm now massively taken with Wales. Unfortunately Snowdonia is a bit far from Southampton (5.5hrs) to go with a 2 year old and a couple of dogs, so I thought a short midweek stay in the Brecon Beacons might be a good idea once the kids are back at school and assuming its similar??

We were in Betws y Coed when in North Wales, so where should we be looking to stay?

[S10GTA]

Sorry, forgot to add I'd be looking at the cheaper end of the market, maybe a small cottage but somewhere that will accept dogs. Maybe a mobile home?

Really looking on recommendations for the area to stay ideally.