Thanks Alot Brother! It's All I Needed8k pulls 40 amps(220v), so a 50 amp breaker will cover that. Your gonna need 48k btu in ac to cool that room. That pulls 40 amps(220v). Gonna need at least 2 20 amps(110v) in dehumidifiers to keep your environment right. Another 20 amps for anything else you'll need to run.
Id run it on a 150 amp subpanel.
Breakers-
50 amp (220v)breaker for lights
2 20 amp (220v) for mini split
3 20 amp (110v) for dehumidifier and miscellaneous items.
You'll need 12/2 for the 20 amp 220v, 12/3 for the 20 amp 110v. 6/2 for the 50 amp 220v.
Your electrician needs to decide on copper vs aluminum for your main feed.