for removal quickest and cheapest option is a mini digger and a mini dumper truck, size dependent on access etc, you can do it yourself, nice open area to learn in, or pay a driver, driver is much quicker if you don't know what your doing, (i always pay a driver).
depending how far the stuff needs to be moved to be dumped and how thick the layer is you are looking at 1-2 days to remove it all