£100k will open a lot of doors
It's £100k not £1m. It isn't a huge amount of money. It's considerably less than the value of, say, the average house in this country.
a hostel is providing a service to tourism and providing local employment
So what?
Lets look at the Investment visa, shall we?
This visa is for people who have a successful business or investment career, and have a genuine and realistic commitment to be involved in investing or business in Australia.
Oh, so not people with 100k wanting to start yet another youth hostel

Ok so what about about a Business Development visa? Probably more suitable.
For people who have a successful business career, and have a genuine and realistic commitment to be involved as an owner in a new or existing business in Australia.
Whoops, failed again.
This just isn't the right amount of money to be life changing unfortunately. All it can really do is get you a nice car and help you buy a house (It wont even buy a house, it'll simply form a really nice deposit for one) or perhaps start a business within the UK.

