4+ FFA $40 Budget Challenge

Hey guys

Looking to build a deck that matches the description. I'd like to keep it one or two colors. I've never attempted to build on such a small budget before. I usually pick a card and build around that so this is a new approach for me. Is there a color or color combos that are easier to build to budget? I've started looking through some cards but like I said I've never taken this approach before so I'd love some advice. I'll update as I find cards I'm interested in.

Okay so after some digging and basically ripping other people's ideas off this is what I'm thinking:

Land
4 Orzhov Basilica
4 Orzhov Guildgate
5 Plains
4 Scoured Barrens
7 Swamp

Creatures
4 Blood Artist
4 Cartel Aristocrat
2 Skirsdag High Priest
2 Suture Priest
4 Zulaport Cutthroat
3 Grand Abolisher
4 Kalastria Healer
3 Mirror Entity

Spells
2 Dark Prophecy
4 Immortal Servitude
4 Return to the Ranks

I'd love to make room somewhere for some Springleaf Drum / Throne of the God-Pharaoh action but I may be trying to do too much. Also I've been reading about extort in multiplayer is that viable here or again, am I reaching for too much?