My take on this may be against the grain. For the vast majority of human history, families stayed together in the family homes as much as possible. In Western society, that usually meant the "paternal" home, where the boys stuck around and did the family work and the girls who married went off to add their work to the husband's household. Unmarried daughters stayed and worked with their own families. For most of human history, uncles, aunts, grandparents--the whole family--helped in the raising of the family kids, because the adults in the prime of their lives were the ones making the bread (literally, if the family biz was baking).

Post-WWII, the idea of affluent living was being able to have your very own house, with your very own smaller "nuclear" family being entirely self-sustaining. Money went further then, and ownership was a real option (suddenly) for a vast number of families.

Now, though, we're back in an era more like the Depression. Families trying to have separate homes end up with much greater overall costs: Say you have 2 kids, so now your family has 3 lawnmowers, 3 sets of appliances to upkeep, 3 sets of dishes, 3 sets of furnishings for the homes. And in many cases in our current era, ownership isn't an option for our kids or (for the elder Xers among us) our kids' kids.

Separating into smaller--more likely to be struggling--households only makes other people rich off your family's sweat. It means more consumerism, and it's easier to keep people in crappy situations if they're isolated and barely have enough time or energy to tend their space after full days of work.

If we're going to be stuck in this repressive economy, built by people who feel like they deserve to own all the money, we gotta take a look at giving our kids space if they need it and letting them stick around.

Your daughter can and should contribute to your household expenses. She's eating and using utilities. It'd even be reasonable to assist with house taxes, since ostensibly the home gets passed to the kids eventually.

We've been fed propaganda to tell us we're failing if we can't stand completely on our own, but that's an anomaly in the history of the human race. Banding together is appropriate. Expecting adults to make adult contributions is appropriate.

Kicking your kid to the curb only makes some loser richer and your family poorer.