What kind of condition are the tires in?
They look good. No cracks.
What is the exact width of the trailer? 9 foot as to wide to move it would be an oversized load.
Can the equipment be turned on and tested to make sure that it still works?
Yes. All the cooking equipment is propane. It is hooked up to electricity.
What is the gross weight of the trailer?
I'm not sure. I pulled it with a three quarter ton truck and it is plenty heavy. I wouldn't recommend a half ton. It has electric brakes.
Does everything still work?
Yes. I've fired all the cooking equipment, and the coolers are all plugged in and running at temp.
How much does this food trailer weigh, including the equipment, and the water tank full ?
I've never had it on a scale, so I really don't know. You'll need a three quarter ton truck at least.