What if it’s a new couple of two homeowners who move in together, should they sell one property before the relationship solidifies?

What if the grandchildren are in secondary school when Nana dies, is the family allowed to hold on to this second property for the few years until the kids move out/in?

What if you accept a contract position in another town, should you be forced to sell and buy, or is it okay to rent out the home you have and rent another elsewhere?

My point is that there is nuance at the lower end of the scale, and the enemy is big corporations and landlords of massive portfolios.