Yeah, your setup seems fine, but since you already have an Archer router, I guess it would also have a VPN functionality. I think it's OpenVPN, so you won't need WireGuard and Pi now. I mean it's a choice between a bit slower VPN vs. putting in some 5-10k Rs. for a Pi and getting a faster VPN.
Not sure about the OTP thing, have never tried it.
And yes, it's free to put Airtel router into bridge mode, you just have to call up the Airtel guy or send an email to them.
Not sure about the OTP thing, have never tried it.
And yes, it's free to put Airtel router into bridge mode, you just have to call up the Airtel guy or send an email to them.