Brighton is not cheap
zaslal Phil Spector v Fórum Veľká Británia
Brighton is a very popular tourist resort and is expensive. The best thing to do is to assure you have a job offer before leaving for the UK. Your current earnings are way too low to survive in the UK.
Also, never send money or deposits to the UK for either housing offers or jobs as these things are most likely not real offers and has become a huge scam problem in the UK (gumtree).