If you live in a sufficiently low density area (rural or suburban with large lots) you can put the two networks on different channels and they won’t meaningfully interfere with each order.
The chances are, if you live somewhere like that, somewhere that actually has a low noise floor for RF, then you likely also have a lot of space to cover with your wifi - and that means sacrificing range (via additional access points) for the second network..
For me: Wifi is great! But, whenever it's practical, I avoid it... Everything with it is a tradeoff!
