Probably I would say that things are starting to get a bit tedious now... For some reason the game does not seem to want to drop me the items I need to unlock the other mini games - are other players finding this also?
This coupled with the extremely long wait times for some of the items causes the game to drag on a bit monotonously at times. Couple that with a storage building that can only contain a limited amount of products and there is not much to do at times at these levels.
One good thing to note though that although you need to get more party points to level up the levelling up is now split into three sections and each time one of these three sections is completed, you get two hours of doubled time.
At level 26 I still have a few buildings to unlock which are available because they are just so expensive.
My tactical advice would be to utilise The Marketplace to sell batches of your high value items. Keep your mix it buildings working all the time except when you are ready to complete social goals. Go for the social goals when you have double speed time.