Sidisi deck help

Hi,

I want to build a Sidisi Deck, but sadly im a poor college student, so I have set a budget around 200/250 dollar.

This deck was inspired by the Commander's Quarters, and I added some cards that seemed good to me or ones that i already own.

I dont have much experience with deckbuilding, so I wanted to ask if more experienced builders have some tips, tricks, or hidden tech cards I should know about.

here's what I have so far