How can i afford this game?

Im so desperate to play this game on omega, the 10ish hours on alpha was such a shit experience but it really opened my eyes to what i actually could do and i really wanna commit.

I can't justify putting £200 into a 2 year sub without it being able to be a plexxed account from there onwards.

TLDR; This is a plexxing question, unless there are any REALLY good discounts that i could catch?

I suppose to begin with, PI from an omega account would give me like 1b per month, which means i need to find a way to make another 2b per month doing something at least slightly enjoyable, thinking of living in a WH, so maybe some safe gas huffing, ratting and mining would be chill. Maybe i could make some money through pvp somehow?

Is this possible? and how do you guys do it if you also live in a wh or something similar.

EDIT: Forgot to mention i'm under 18 so i cant have a full time job or even minimum wage, then omega would be a no-brainer, sorry for the confusion. (I currently work a part time job, so low work but low pay.)