Honestly I would go 2nd hand, the number of amps & speakers you can get for next to nothing these days is ridiculous. There’s tons of hifi from the 60s/70s/80s that was built specifically with turntables in mind and was totally over engineered and built to last
I’d even go to charity shops and Google anything I see that looks interesting. Make sure it has a dedicated phono input and ideally an MM/MC selector (moving magnet/moving coil)
Amps can be a bit tricky with scratchy volume pots and dried out capacitors etc so maybe a repair/recondition place that sells on with a 3 month guarantee or w/e (do cash converters have a guarantee?) might be an option depending on what’s near you but speakers have so few moving parts that you can pretty much tell by looking at them if they’re gonna be fine or not. (The one thing that’s not readily apparent is if the speaker cone has moved ever so slightly out of centre so a manual test is to gently push the centre of the woofer in and out to feel if there is any rubbing. If it moves freely it’s fine)
Another issue is space - I mean there’s no point getting 12” woofers if you live in a tiny room and equally there’s no point getting 3” ones if you like bass and/live in a barn
So, without knowing your circumstances or even what kind of turntable you have it’s hard to give concrete advice but £200-£250 is more than enough to get a decent amp & speakers on the 2nd hand market - even £50 might be enough if you’re lucky - and @I_LIKE_CATS’s recommendations look decent if buying new
One other point is that you’ll need to think about where to place your speakers - don’t place them on the same surface as the turntable (they will feed back) and don’t place them against the wall/in corners as this is acoustically very bad. The number of people who spend a fortune on audio gear only to install speakers in the wrong place & totally muddy all sound is obscenely high, so maybe even price in some wall mounts/stands