If they're single this might be a much better option, but once they're married and have kids, moving isn't the solution anymore, as there are many other things to consider, like school and work. I feel more comfortable living in my own home than renting, and the process can be simpler since there's no rent or frequent moving. There's nothing wrong with building your own home, as even a small one can make your life more comfortable and peaceful. While some people may have their own views on this issue, for me personally it's better to live in my own home even if it's small..
This is already another stage, when children appear, moving becomes more difficult, because they have friends, kindergarten, school, environment, hobbies and for children it is all much more difficult. But there are such people for whom changing location is much easier than for other people. I think that most often their own home will be a priority for a young family, especially when they decide to have children. But I do not see any difficulty in selling the home and moving to another place and buying a home where they are moving.