Like everybody else has said, I don't think there's a "wrong" way to do it, you do it however makes you happy. I'm doing the best I can for each house with what I have, I'm in no rush to do all the facilities and haven't even made the first shop yet, after 30 hours of playing. I've only made the hospital and the cafe so far. Even the houses I'm not so interested in have been fun to do (how many pro-wrestling houses do I have to make in this game anyway? lol!)
I think we are so used to the goal of a game being to beat the game that this one can be a bit confusing. You can't really "beat" HHD, unless you think unlocking absolutely everything counts as beating it. That's why a lot of the reviews have been about lack of challenge, because there is no challenge if you don't add your own. The point of the game for me is to have fun designing, using what I've already unlocked, and then going back and making it better with items I unlock later. It's not a game to win, it's a game to enjoy. You could just speed through it, do the bare minimum for each house and unlock everything, but if that's all you do where's the enjoyment? And will you remember whose house you'd want to put that rare item in, once you've unlocked it? If you make the first design for each house the best you can with what you've already got, you have more of a connection with the game, and more knowledge about that house. So when you're designing you can think about the houses you've already made where you'd put that great new item you've just unlocked.