Silver is really easy to get by just playing the game. You get silver (and/or tickets that you can turn into silver by spinning the wheel) for basically anything as long as you don't stand around and do nothing. If you have a subscription you usually get at least 500 silver for clearing the wheel. That's probably like 20k silver per month and you haven't even really played the game. You will get more silver when you collect the almost 100 tickets that you need to clear the wheel on average.