Around 2000 I was watching a tv show about homeless men and they were interviewing one. It wasn't until the camera zoomed in and they showed the name that I realised it was my brother. He'd been a heroin addict and spent a decade pretty much terrorising the family and doing unbelievable shit to us.

Anyway our mother finally kicked him out and then moved overseas; we moved out and got our own jobs and own places, I hadn't seen him for ten years or more...

We contacted the tv show and they contacted the people who were feeding the homeless and I brought him back to live at my place. I was sharing a 2br apartment with one of my other brothers so we let him sleep on the floor in the lounge room. We also bought all the food, paid for elec etc. All he had to do was cook (if he wanted to) as he had plenty of time being unemployed and liked to cook, so we let him.

Getting to the point, I charged him $15 a week rent. He was outraged by this at the time, because he was only on unemployment benefits - about $200 a week back then - and he thought I was being a prick. He thought I should let him live there for free. But I what I wanted to do was get him used to being financially responsible, and used to the idea of having to pay his bills no matter what (I told him I'd kick him out if he didn't pay his "rent").

Fourteen years later he is clean and has been for all this time, has a long term job and a career and money in the bank - and a few years ago he thanked me for making him pay rent. He said it did help him to learn about saving and acting responsibly.

..I feel like $100 is a little high, but then again I'm from Australia, I'm kinda old, and prices are different all over the world. So don't put a whole lot of faith in my answer, it depends on lots of thigns and maybe you're not so well off yourself.

But yes it's very good to make sure he pays somethign every week. And don't let him off because "But it's my mates 21st this week and I have to buy a present!" or whatever. A landlord wouldn't. Help him learn to budget by being consistent.

In general yeah I think you did the right thing, it might be a smidge too high but that's just my opinion and I may be out of date on prices, I haven't lived in the West for more than a decade....