Certainly in the UK no degree would be needed. Presumably you need to convince investors to lend you capital. Any ways in which you can show you have handled money wisely would help. Showing proper research that the potential market is there is important. How will you compete with existing hairdressers? What will you offer that they do not or how will you do it better? Do you have the experience and potential customer-base already? If not, perhaps gain a hairdressing qualification and gain experience working in a salon first before looking to establish your own.