yeah i had it just as hard as above, though i had to pay for my own schooling as well, if i wanted to do year 11 and 12 (back then it wasnt compulsory) then i had to pay for everything myself, plus school books, excursions uniform etc. So i had 2 jobs while doing TEE just to afford to go and live haha, yeah my mum was a hard bitch, plus i had to pay $175 per fortnight for board, chip in for the phone and internet and buy my own groceries, plus cook and clean too. I had a very two very tiresome years, though i graduated with a high score, then moved out the next day and never looked back lol
i say yes make them pay board, but only ift they have finished school. While at school and working they should pay for there own luxuries such as phone cred, clothes etc. Soon as they finish school and start work fulltime the make em pay, it will set them up for when they move out of home. They may hate you at first (i did) but then they'll thank you for it later. It sure showed me a thing or two about budgeting and paying bills etc