hi jimp thanks for the reply.
Does it mean that for example:
pfSense LAN IP: 192.168.1.1
Virtual If: 192.168.100.1
Separate DHCP Server IP: 192.168.100.2
Default Gateway: 192.168.100.1
IP Range: 192.168.100.3 - 192.168.100.253
The DHCP clients will NOT be able to use the gateway?
For my motivation to do this non-best practice setup, there are a bunch of static IP clients/servers in 192.168.1.0/24 and the clients of 192.168.100.0/24 are windows domain members pointing to an IP in that subnet. I know not the ideal setup, but while we're going through the proper design on paper and red-tape (I arrived in here with this weird setup already in place hehe), this would be the least-intrusive way of getting the load-balancer integrated in the operations.