I am considering grinding the 200% first deposit bonus up $600 on Mansion using SSS at NL20 and NL50. It seems quite possible in the 60 days your given. The only problem is so many other SSS players on these limits! The waiting lists are often >10 at NL50 and names like "20bbRules" can be seen everywhere!
Don't they have enough tables to open for these players? I'm afraid that its going to be difficult to be able to sit on enough tables at once to clear the bonus. If you do manage to get into a table you will be confronted with 3-4 other SSS players.
Will have to monitor if the situation improves in the evening...