Now that midterms are over i can make some posts.
To level up as fast as possible you will need 2 things… A lot of country homes and a lot of neighbors.
Neighbors can help you with community buildings and also give you energy. If you are trying to get rich DON’T DO THIS! because country houses generate very small amounts of money. you’ll be able to powerlevel extremely quickly using this method ,after you reach lv 60 with your town full of country homes you are free to do whatever you like.