I have a 3in section of pipe for the dump gate, My tyre setup is almost the same as yours without the welding to receive the pipe. As far as being on a budget, I spent that over the course of a few months. I dont have a lot of tools that were required in the other forge instructions (welder, saw for cutting steel) I also own a small car, so i couldn't fit most things necessary to build the other forges in my car i.e. 55gal drum. I had planed on using clay instead of refractory cement but I found out mississippi mud is no good which bumped my cost up about 40 bucks(S&H) and the pipe cost me 45. everything else was 5 bucks here and 5 bucks there.