What's the best way to prepare a base for Envirotile Recycled Rubber Pavers from Home Depot for a patio?

What you want to do is the exact same as putting down paving slabs, set up your screeds and put in a stone base ( about 3 inches ) and whack it using a whacker plate ( available from any plant and tool hire ) The stone will whack down about an inch or so, this will give you a firm base to ensure your slabs dont sink. Now using 3 parts sand and 1 part cement fill the base up to the top and screed it off flush with the screeds around the outside and whack it down, then fill it back up again and screed it, but dont whack it this time. Finally lay the recycled slabs on top. The moisture in the ground and air will make the sand and cement go off over the coming week and it will be fully set. Overall, you want to dig a depth of about 150 mm or 6 inches