Based on BigLupu's Arcum Dagsson list. I'm folding this list into the budget tier. Aiming for sub $150. Prices will fluctuate so this price point will not be solid.

Activate Arcum Dagsson, sacrificing a dude to fetch out Paradox Engine.
Cast anything, hopefully it's a 0CMC dude. Untap Arcum Dagsson.
Tap Arcum Dagsson, sacrificing the dude to fetch out Citanul Flute.
Tap Citanul Flute, tutoring a 0CMC dude to hand.
Cast dude, untapping Arcum Dagsson and Citanul Flute.
Repeat using Citanul Flute to grab 0CMC dudes and Arcum Dagsson to sacrifice them and fetch out Basalt Monolith. On the next iterations, find Myr Retriever and Junk Diver. You can loop these guys with Arcum Dagsson and Paradox Engine for infinite mana tapping Basalt Monolith each time.

In short:

Tutor dude with Flute
Fetch combo piece with Arcum
Cast dude
Repeat