Earn some extra with music?

Hi all, I want to earn some beermoney (duh) as extra saving for a good desktop to produce music.

I already have enough, but I'll have nothing left if I buy the desktop right away so I first want some extra money just in case.

The problem is, slicethepie doesn't work in my country (too bad, else I could make tons of cash as I have a lot of musical insight & experience) and I can't really think of other ways to earn money with music.

I pretty sure I'm capable of writing arrangements of existing songs, and I'm also capable of HQ music reviews and own compositions and things like that (playing the piano for 11 years now, always been a musical type of person)

An idea that came to my head was to write & sell sheet music (arrangements for example) though I have no clue were to start.

I'm hoping you can give me some tips were to start, or possibly an alternative to slicethepie.

I'm new to beermoney or anything related so I might need more help (if anyone can offer it through skype or so, that would be great)

thanks!