well.. you can start mining with 2 to 3 gpus it depends on which graphics card you are purchasing . you can not buy ASIC miner coz it cost more the 100k . currently most profitable coin to mine is Zcash,Zclassic . you can buy rx 470 around 18,000 to 20,000 .
oh thanks bro for reply. btw i bought 10 rx470 at 16500
an where from u bro?