I would also suggest you to use a Hardware Load Balancing Router, as Usman bhai said, that it can provide you many many advanced feature...
I am also purchasing one for my own setup, it is costing me about 16000 Rupees.
i will really appreciate If you can please tell me any cheaper solution. Becasue i am unable to find any.
I also dont know how t configure it, wll have to read the whole maual. And which on do yo prefer me to buy.
Well ask for D-Link load balancer as it was with two wan ports and 1 lan port hope you will get it cheaper in local market. and about T-P link load balancer i heard from some of clients that it works nicely but not tested myself.