Then, if you don't have to find the house of your dreams or a collection of objects to be the envy of the whole town and the other players, where's the hook? Why would we keep playing Happy Home Designer? In the game, each 'mission' is called a public works project. uhm, happy interior designer (and you'll do some outdoor designs too) whose task is meeting the needs of the town through new (and very cute) infrastructures, houses for the town's residents, and public service buildings. Indeed, you have a job from the start in Happy Home Designer you don't even have to think about your bills, because there are none. The aim here isn't to evolve your estate and add new possessions, and thus you can also avoid the hassle of having to go beg Tom Nook, bartering with neighbours, or having to look for a job. You don't have to save money in order to keep improving your home or your collection of items. Having said that, you don't have to earn a living either.
You're not a new neighbour (in fact, you don't even have a house, despite being a home designer!).