dual ISP, set range for diffrent ISP

[anylettuce]

using 2 ISP at the moment. I am looking at doing the following if I can
Have an ISP 1 range, /23 some are in DHCP assignment and the rest are manual
ISP has a similar setup but all manually assigned.
10.0.0.5 is DHCP ISP 1
10.0.1.5 is static assigned ISP 1
10.1.0.5 is static assigned ISP 2
I do have it setup that if ISP is 1 goes down isp 2 takes over, mostly I would care about the dhcp range

in the past, I had to tell pfSense to send this ISP to this ip address, something a little more automatic would be nice.