How to make your own RC Drift track for cheap (use anywhere !)

want your own portable drift track I have looked into all the options carpet? different type of barriers, can it be changed ?
I have figured the cheapest way and the best way of doing this for me !
the link for the super expensive curbing UK shop
www.ebay.co.uk...
the link for barrier/garden edge trim
www.ebay.co.uk...