I guess I pose this thread in part because I'm trying to figure this out for my own kids.
I'm still in the middle of my own pain... my wife is in school full time and is just finishing her Bachelors. We're racking up debt and paying a little as go on hers, but not much as she's otherwise been a stay at home mom while she has been in school.
My son just turned 4, and we have one more on the way. I disagree with my wife here, as she thinks she'd like to pay 100% everything, using logic around... happy thoughts, time to blossom, shouldn't be burdened, blah blah blah. It's also easy to think that while she effectively goes to school herself on loans and with me working and paying what we can from my single income.
I came from the opposite camp. I graduated from public university in '05. I did the community college thing then transfered to keep costs down. I worked a 2nd shift job all through the college (~30 hours a week driving a forklift) to pay my rent/cars/etc. Every summer I picked up an additional day job. I also shoveled with a plow crew at 3AM any night that it snowed. I paid for damn near all my own tuition/rent/etc. but I worked my ass off. I still managed to drink a few beers and have a good time. I finished with ~$5K in debt, which my parents paid off as a Job Well Done graduation present. They had the means to help me all along, but after I sluffed off and failed out my freshman year (wasn't ready to grow up), I chose to pick up the reigns and put my own skin in the game to make it work for me. I couldn't motivate myself on somebody else's dime.
I guess I believe in setting some set $$ assistance and being very clear about it. Basically saying I will pay for the equivalent of a community college the first 2 years and set them up with a car/computer,etc. Then 75% of state university upon transfer or something to that extent. The rest is up to you.. .and you can work while studying to emerge debt free, or you can finance that portion, depending how they decide to use their time. If you want to go to a private school, my assistance is a set $$ amount, the rest is on you. Begin the life lesson about debt, leverage, opportunity, etc. I also don't mind paying some assistance towards living expenses, again with some strings attached... defined amount, they budget additional, etc. I think if my kid earns scholarships or other earnings, I'll transition the $$ that was already set aside and still gift it as a first home assistance, or some other "investment" type gift that doesn't translate to an open spending account.
Now if my kid decides to go a trade school route and bypass college I'll fully support that path as well. Upon succesful completion, the same money and assistance is on the table along that path.
I'll check back in a decade...