i would charge £360. if its around 250 sq metres then charge £1.00 a sq metre to clean. then return on dry day to sand. charge about £60 labour for an hour and a half brushing in and about £30 for sand,
a lot of people who start up charge to cheap and then they realise when they total up all their over heads they are not earning enough. professionals are not cheap so get your pricinf right. a lot of people in the posh areas like to pay more for professionals who they know who do a good job rather than the guy down the road in a little van who is cheap. good luck. let us know how you get on.