Sohai TS, dont know how many people will now rage over this suggestion. London high income, earn uk pound. Your friend either student, convert from myr ofc expensive af. If working, sure income wont be high because transfer from developing country. Alot of locals here quite dim, listen to friend this listen to friend that, end up see the world in wrong way.

Also, you are not local you won't know cheaper places. KL very cheap meh? Outside of coffee shop, none is cheap. All above 10.