It is difficult to determine the specific reasoning behind someone's decision without more context or information about the individuals involved. However, there could be several potential reasons why a boyfriend might base his marriage proposal on the factor of the woman selling her house:
Financial security: Even if the boyfriend is well-off, he might want to ensure financial stability in the marriage. Selling the house could provide a lump sum of money that they can use together or invest for the future.
Symbolic commitment: Selling the house could be seen as a symbolic act of commitment and starting fresh together as a couple. It may represent a willingness to leave behind individual possessions and merge their lives in a new home.
Location and future plans: Perhaps the boyfriend has plans to move to a different location or country, and selling the house is necessary to facilitate those plans and build a new life together.
Equal contribution: The boyfriend might believe that both partners should contribute equally to the marriage, and selling the house could be a way of ensuring both parties make significant sacrifices for the relationship.
Personal beliefs: It's possible that the boyfriend has personal beliefs or values about sharing resources or starting a marriage on a clean slate, and selling the house aligns with those beliefs.
Misguided priorities: While the boyfriend may not need the money, he might place importance on financial matters and see the selling of the house as a crucial factor in building a life together.
Regardless of the reasoning, it's essential for both partners to have open and honest communication about their feelings, expectations, and future plans before making significant decisions like marriage or selling property. It's crucial to ensure that both individuals are on the same page and have a mutual understanding of each other's desires and intentions.