2 x Vector3 + int | Only needed Realtime game | Best way ?

Hi !

I Have created a game but now i want it to be a online matchmaking on phone (2 Players) and flash (4 Players)

I don't think it's necessary to pay for 3d party networking service.

I know some about server side and client side and the game is so simple! that you only need to be Sending click position ( Hold ) release position + int. So data ( 2 x Vector3 + int ) only need to be send wean one player click or touch. But then it's queue to matchmaking + Database with ( rank , win / , loss , Player id)

So with that small demand is it easy to create a master server and is it cheap to then rent a server for it?

And what path do you think i should take to achieve my matchmaking system ?