The requirements are not well understood.
a. you have two isps
b. you have one MT router model?
c. you wish to have two wifi networks, (two SSIDs) with each being serviced by one ISP
(isp1- ssid1, isp2 -ssid-2)
What subnets do you have on the router, can we assume three subnets?
1- wired normal use subnet a
2- ssid-1 subnet b
3. ssid-2 subnet c
Diagrams would help
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