Lots of good ideas thanks all!
The reefer container was my first thought but a working container with AC it's expensive, in my county the price of them is high! $3200 for a DRY 40' shipping container or $3500 for a 40' reefer container with a bad AC unit. Maybe I could go with a reefer container because of the great insulation they have and save big money there but not sure!
I got a quote from Surna for the equipment but size it to 8,000watts just to be safe and maybe an upgrade in the future.
5 Ton Chiller: $7,527 USD
5 Ton Air Handler: $2,575
1 Horse Power Flotec: $439
65 Gallon Reservoir, Plumbed and Insulation $475
Total $11,016
@Diabolical666 I search your username for your setup but couldn't find anything could show me some photos and info of your trailer grow
Thanks