Talk:Business center/@comment-130.15.43.135-20120120180813/@comment-3991817-20120121002025

The time taken for the upgrade to complete is indeed only made up for after the amount of days the upgrade takes in hours. So the upgrade to lvl1 will pay off after 9 days.

The wisest thing to do is to 50%-fast-forward twice when upgrading. This will reduce the time that has to be made up for to 0 and it will also gain you some extra xp in the process.