Since GST ON RCM basis is postponed till March 2018, you need not to pay Gst under RCM, if the government brings back RCM concept, then if the amount paid per day to a broker exceeds 5000 you should pay GST on RCM basis
Mr srimanth your concept is applicable when supplier is unregistered and recipient is registered. but in this case both are unregistered so question of RCM defined u/s 9(4) of CGST act, 2017