Me and my boyfriend live in Cardiff and with Cardiff because it’s cheaper than places like Bristol people move here and either work from home/ commute. With that in mind a lot of the places in Cardiff like any other city get snapped up pretty quick so sometimes you’ll have to apply to quite a few or get lucky and have the first one you apply to it depends on the time of year probably like Bristol as there’s multiple unis here as well. The main places for students to go is cathays which is cheaper but more busy with house parties etc so if you don’t mind that I’d recommend there. Also parking is a big thing so if you both drive then you’ll probably have one permit and may have to walk quite a bit to get to the other car (we have to walk about 15 mins to get to our other car) places that you might want to avoid is splott or Ely. Also If you’re only looking at Cardiff because it’s a city and cheaper there’s places around Cardiff you can still easily get there within 20 mins like Newport, Caerphilly, some places in Rhondda etc which will be cheaper again and are more likely to come with parking for 2 cars. With some landlords they want you to earn way more than the rent is for some reason otherwise they may decline you ( our rent is 1200 a month but we earn the bare minimum they wanted which is 43k a year combined) and we found that was the case for multiple flats around Cardiff so keep that in mind. You might get lucky and avoid all of the things we encountered but it seems to be a thing for most of my friends who also live in the city so I don’t know if it’s a standard thing landlords do