I have been asked by a local sports center to clean their 2 tennis courts. 1500m2 total. I will also clean the block paving approx 60m2 at the entrance free of charge - they have other block paving around the complex and I would like to get the contract for that as well. The tennis courts are currently unusable due to a lot of moss and other **** growing on them making them slippery and dangerous. It is a Macadam surface as far as I can work out with painted on lines that should stand up to the washing. Is there anything I should be aware of apart from being careful not to damage the surface and the fact they are flat so moving the **** that comes off will take much more time? Also any suggestions on price?