It really depends on the people. You'll want to get an understanding of what they're like and what they value, and try to explain to them the ways that owning a smaller home can help with that. For instance a lot of people want to be able to save money. You can point out that the cost of owning a smaller home and using a storage unit will be cheaper than owning a larger home. If they are people that like being outdoors, or like adventure, you can talk about how the home should be a place designed for down-time, which they wouldn't need much of. You really just need to find a way to convince them that it's the right choice for them. The only way that should be too hard is if they value space more than anything else, so just try to avoid those people if you can.