Ok Im going to be brutally honest here and tell you that it is a LOT of hard work getting those initial clients in and keeping them. You have to do so much promotion not just getting out there and interacting with the clients in the hair salon but you also need to do paid for advertising, not just a one of credit card size ad in the local paper but quite a few big promotions so that people know you are there. I would set aside a couple of hundred minimum just for advertising.
Basically you need to add up all your expenses. Products, equipment, stationery etc etc then you need to include your rent whatever that may be and then decide if you can afford to set up on your own.
Personally I wouldn't want to be setting up now unless I already had an existing client base, enough financial support to pay bills and the determination to go and get the clients.
They will not just wonder in you have to get them and its a lot harder than people sometimes think.
I would have a look at your finances first and decide how much you have to spend and what you need to be earning minimum to survive financially.
Have you thought about working for someone else before going it alone ?