Has the trailer ever been health department certified?
Yes, my husband held a Texas Department of Health when he was running a food truck.
How big is hot water heater or does it have instant hot water? And where is heater located.
There is a 10 gallon tank located inside the air conditioned unit.
Does the advertised 31' length include or exclude the goose-neck on the trailer?
Excludes. Part of goose-neck has a build out that can be accessed from the entering compartment and used for storage.
What are the trailer axle weight ratings and are they brake axles?
The weight of the trailer alone is 5100 lbs. This trailer was used to transport commercial loads. There are brake axles.
What is the length of the porch area?
9 feet is screened in and floor is covered with metal and has a BBQ pit in this area