Using a rotary really isn't difficult at all,but for the price of a rotary,products,pads etc.....you could get it fully corrected,expect to pay £275+
I get so much work as a result of main dealership valeters that think "using a rotary really isn't difficult". It is very easy to cut right through your paint if you don't know what you're doing and you aren't using the appropriate products.
As the pro-valeters on here have said - get a professional to do it. £60 is too cheap, you'll just get a bodyshop monkey doing it for that sort of price. You should expect to pay anything between £160-£300 depending on what else they will be doing (e.g prepping/waxing).