When my brother faces a bleak future after being laid off in his mid-50s...

At that age, it's hard to find a job at another company anyway,
and the kids still need to grow up more.
I believe that without special skills, one eventually has no choice but to start a small business.
Among the franchises, it seems like Kyochon or Paris Baguette have relatively low closure rates.
Including the deposit and premium (key money),
it looks like you'd need to set aside about 500 million KRW to take over a decent one.
I told my wife I wanted to help my brother out with a maximum of 500 million KRW,
but she doesn't look happy.
He is my only sibling.
I'm saying I'll help him just this once in his lifetime,
is this an unreasonable request?