Back with another question (and of course, its to do with brakes)

Been working on my 5500 trying to get everything working so that I can actually drive it and do some work, but the drum brakes just have refused to work for me thus far. I've been thinking about making an "upgrade" to disc brakes
what I really want to know is if 1. this is worth it and 2. is this possible without having to fabricate my own parts. I'm probably going to make a post showcasing the truck so far on what my family and I have done with it so far, but having to take a break to wait for money
and plan ahead for future projects with this truck

thanks again for any info!