I have a non- budget Kazuul deck and I find one of the biggest challenges mono red decks face is being out paced by strong ramp. Tunnel Ignus would help you race those ramp decks pretty efficiently. For it I would cut Deathbellow Raider which you cannot run because it has a black mana symbol on it. Great idea though, budget decks seem like a lot of fun.
why is Hellkite Igniter in here? you only run one artifact so at most, it's going to get +1/+0 from its ability. at worst, you won't ever want to activate it because it won't ever do anything.