Ballyfermot sits roughly 7 km west of Dublin city centre in Dublin 10, and because it is a residential suburb rather than a tourist district, prices for guesthouses, casual food, and pints typically run noticeably below central Dublin averages. The trade-off is that you will commute in for most headline attractions, so your budget should weight transit time and Leap Card costs against the savings on lodging and meals.
Because Ballyfermot's appeal is community-rooted rather than attraction-heavy, the biggest budget wins come from slowing down: free parks like Ballyfermot People's Park and Le Fanu Park, community events at the Ballyfermot Community Civic Centre, and pub-led evenings where a meal-and-a-pint deal beats any tourist-menu pricing. Travelers who plan a single Dublin city day around a transit pass and eat locally in the evening usually get the best value.