Will it be a problem to buy a new house, have no relatives and do nothing?

It doesn't matter if you live in a new house without ceremony or hospitality. Depends on what you think.

If you do these things, it depends on the time and the zodiac. Of course, it depends on the situation of the newlyweds. Otherwise, it will be bad to conflict with the new house. If something is unpleasant, don't do it unless you go.