Is love enough for what? You Maslow has a theory that there are a hierarchy of needs. You have to fulfill certain needs first before you can get to others. Having shelter and food is perhaps the most basic. Then comes sex. After that love and self-actualization.
The idea is that if you don’t have money, as in your example, then you can’t have love. It doesn’t go the other way around. Love can not be sustained if you do not have the things that come before it.
However, I think it is important to point out that the need for money is somewhat arbitrary. It is based on expectations. It is based on the status that one wishes to achieve in society. So if I were rewriting Maslow’s hierarchy, I would put status in there somewhere—perhaps at all levels.
One can be happy with all different amounts of material possessions. It is possible to be happy with a thatched hut and what little grain you can grow and perhaps a chicken every once in a while. It is also possible to have a large mansion and five cars and feel like that just isn’t enough.
It all depends on your reference frame, and I would argue that the relevant reference frame has to do with what you consider to be your peer group. If you are within your peer group, then you have achieved your needs for shelter and food. Then you have sufficient preconditions for love. If you fall from your current material status, then you no longer have the preconditions necessary for love, even if plenty of people are happy enough at this status level to have love.
You have two choices. You can either let yourself be happy with your current material conditions, or you can move back up to where you were. Either will allow you to have love. It also works moving up. Moving up to a new level of material good can leave you unsatisfied, simply because you do not know how to relate to people here. If you can not be happy, you can lose your love here, as well.
Love can survive the transition between different levels of material goods as long as the people can allow it to make up for any change. I.e., if the relationship is strong enough, the couple can be happy no matter how poor they are. Then they won’t beat up on each other, and the relationship can stay strong.
So I would say that love can be enough, but it isn’t always (or even often) enough. It all depends on the quality of the love. Love must be of the strongest variety in order to be enough to transition between different levels of material goods or status. If a relationship has started to come apart due to how people respond to changes in material status, then the actual transition will kill it.
On the other end of things is the question of whether love is a stepping stone to self-actualization or if it is self-actualization all on its own. In my experience, love is self-actualization. It makes me feel that all is right in my world; that I am a perfect being all by myself no matter how else I am. This is because she accepts me as such no matter what I do.
That doesn’t mean she would accept me no matter what I could do, just that she accepts me at the range of behavior I current exhibit. So as long as I am being pretty much me, and she accepts this me, I feel perfect and I feel love and I am actualized. Nothing can hurt me.
Although I have to say that social-status still plays a role. Probably as one of the preconditions at the level of material security. Social (status) security is as important, I think, as material security. Then sex, then love, then actualization.