You will want AC and heat for year-round use.
I like to keep the messy jobs (casting, cleaning cases and guns, etc.) in the garage or out building.
I like to do the clean jobs (almost all reloading), in the house.
As for a bench, they are never long enough.
As for cabinets, you never have enough storage.
Most presses and dies can rust pretty fast, particularly in hot/humid areas. Dies I keep in drawers with VCI paper.
If you mount the press(es) with wing nuts, you can remove the press(es) and store them in a safe with a heater/light to prevent rust.
Do not store powder or primers in a safe.