Everyone I know in real life, found the "right someone or someone's" when they stopped searching.
In intellectual discussions, we have all agreed that we are immediately put off by men and women "in pursuit". The reasons vary, but the bottomline is the same-it is a huge turn off.
So, My advice would be something between the two ends of the suggestion you made.
Don't give up hope, but stop seeking it.
Live your life, save for a house, be open about your polyness, let it show as a significant part of who you are and in time you will attract the person who is a match.
I know thats probably not what you want to hear-but it is what I have observed.
"Love As Thou Wilt"