Zend certified PHP/Magento developer

How to setup a home-network with a webhost

I want to setup my home-network in a way that I can safely host a website on my raspberry pi.
If I’ve understood everything correct I can setup a DMZ with my raspberry and thus keep my home-network safe. But my router doesn’t show have an option for a DMZ. Should I now buy a new router with that option or can I use a second router dedicated as a ‘DMZ-Router’? My Modem is currently set up in a Bridge-Mode.