Smoking DMT with friends isnt too serious - pretty easy to navigate. Pouring brew for friends can be much more intense and can be a lot of responsibility.... Personally, I wouldnt recommend it unless you have a lot of experience with your brew - I have heard some crazy horror stories from people who experienced them drinking in groups without an experienced facilitator.... I say this because you dont seem to know how you want to make your brew which makes me think you have less experience with drinking....
Drinking and smoking are completely different! Its not a longer version of something similar, but something completely different in almost every way.
Have you drank the type of brew you are considering before? If not, I think you should spend some time testing on yourself before sharing it with others... It's important to get the dosage down and know whether your cooking tech works, and also probably helpful if you know how to navigate that space somewhat.... You dont have to take this advice, but I still wanted to offer it
If you want DMT to last longer, it can go good with a small amount of mushrooms, or just keep passing it back and forth and smoking more to keep going in.... I think either of these options would be easier then navigating a rue or Ayahuasca like brew....