Yeah hobby length is really the problem, your not going to get that much father than 7X multiplier until you start getting level 20+ Hobbies which take at least a week to get with 7X multiplier. Otherwise I enjoy this game. only 3 more days until 20 in all hobbies lol.
you should be able to ave a classes level, instead of reseting all levels, so if I have a 20 necro then switch to a level 1 priest, then feel like going back to Necro after priest level 5 should stay at 20.
Hint: if you think you are taking to long to finish a level, don't complete it push the refresh button and the timer will reset to when you first entered the level.