I use DHCP and have no issues since about 2000. Your post did however bring a very advanced setup with 3 routers. That rarely is something a beginner can handle and while I will advise the 2nd and later routers be configured as WAPs, I stop short of step by steps since those that setup and maintain this must be able to do this work. Or have folk come in and do this then call them when there are troubles.
Google "How to use a router as a WAP" for the methods I use. I never setup the 2nd and later routers as routers but WAPs. That is, the WAN ports in 2nd and later WAPs are not used.
Note: Moderator edited for spelling.
What is the easiest way to avoid IP confliction? My home has a very weird network configuration with many routers and switches such as 3 routers and 1 switch with alot of wifi and wired connections on the network. A lot of our problems is I THINK IP conflictions. Is there a way to assign hard "LAN?" connections a certain IP range and then mobile/ WiFi reliant devices a certain IP range? I really don't have the slightest clue how this networking stuff works or have the time to learn about atm so any quick advice is greatly appreciated. Something pertaining to proper configurations for multi routers and switch setups or maybe a link to a useful article. I know I could just google some of this information but there just seems to be so much that its very overwhelming for a person who doesn't know much about this topic. Thanks everyone and I hope you understand.
Setup: The modem is connected to a router (1st router) then 2 wired connections to another router (2nd router) and switch from the other wire, the switch has wire that leads to the last router (3rd router). Most of the routers/switches have lan connections in them going to either desktops or consoles.
If other information is required please just ask.