ASK HN: Master degree in CS - USA or Sweden?
Ras_: Sweden/Finland: Free tuition. Only cost comes from the obligation that you must be a member of the Student Government/Union. That's about $100 / year. 
Living is more expensive than in the US.If you are Bulgarian as your profile states, you come from inside the EU/EEA area, thus also Danish universities would be free for you.If you want to build best networks for business, get into top universities in the USA. Tuition isn't that much better.
Start-up scene is also nearly non-existent in Scandinavia - severe lack of funding opportunities.If you plan to work in the USA, go to a US-based university. If in EU-area...