I use fox farms ocean forest soil, about $15 a bag locally, 1 bag enough for about 3 to 4 5gal pots
basic fox farms nutes I use run about $45 for 3 32oz bottles off amazon
grow bags I get mine 10 for about $20 off amazon
As for seeds, this forum is sponsored by a seed company, and they are having a 710 sale, lots of buy 10, get 10 free choices for under $100
THe one thing I dont see is Fans, do you have any (intake fan, exhaust fan, and circulation fans)…
Growing in a tent I recommend the exhaust fan for pulling the hot stale air out. Also recommend try to Budget in 40 or $50 bucks for a good pH meter.
Good luck