DIY machine work for heads??

Hello there everyone, I got some 302 heads that I will put on my dart and I am going to do as much of the machine work that I can to them. I am just wondering if there is a way to do valve guides yourself or does a machine shop have to do it? I will be doing the valve job since I have a valve grinder and I will also re-surface the heads since I have access to a re surfacing machine. This is my first time but I have a few chevy heads that I will practice on first. I would like to put in bronze valve guides but the prices of any machine work here in Germany is outrageous! 65 euro (80 dollars) per head to resurface for example.