sure that would work too, but you just know your going to want to Multi-WAN Bond these two connections for better combined throughput from whatever side your on at the time if your paying for these two connections
about 30 minutes after you realise you can Bond them, thats when your head explodes

thinking about the rule sets your going to have to use to route packets for different protocols for best use of the connections seeing as their not end to end bonded with your (ISP)provider(s).