Suggest me cheapest Dual WAN Router/Load Balancer

Messages
379
Location
Nashik, Maharashtra
ISP
BSNL ADSL->BSNL FTTH->Airtel FTTH
Jio
Can some one suggest cheapest Router which supports Dual WAN or a load balance

Currently I am running Airtel FTTH Broadband via Huawei ONT/ONU and using it on my Asus RT-AC58U
Now I am thinking of having secondary/fail over connection(mostly BSNL FTTH) and thus want to club both the connection

Requirement
1. Cheapest Router/Load Balancer
2. Must support Gigabit LAN for future sake
3. Secondary connection support can be Mobile as well (But should not cost much)..
 

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