£3,000 per month just to exist (mortgage, utility, council tax) in a decent but in no spectacular family house in a decent but in no way spectacular area.
£50 is absolutely nothing in comparison and £20 is less than nothing. Theatre you wouldn't get a good seat for less than £100. Live music is the same tier of performance/fame as Man City is hundreds.
Some people appear to be living in the 1980s in terms of costs. The reference has changed.