That will be fine, just make sure to remember that you can only allow as much load as the first one in the series can hold. so if your first strip can hold a max of 2000watts do NOT exceed that.
always check your cables for hot/warmth this is a sign of them being overloaded.
always stick around for a while after you make any electrical changes, this was to observe via sight and smell. keep your nose out for the smell burning components.