When you (and your significant other) make a decision to go on a journey that ends with one of the biggest and most important transactions in life - i.e. buying a house or an apartment - looking into your real estate agent is not the first thing on your mind.
Unless you are going for the ultimate and most expensive smart home setup, you don't need to spend all your monthly income on buying lots of components, sensors, smart bulbs, security cameras, etc., since for most users, it would be overkill anyway.