i do not know the answers to those questions but i asked him the same thing about security. he has it chained to a stake and said that the cannon is very dfficult to move.
A #1 carriage weighs 900 lbs. without implements. A 6 pounder barrel is 884 lbs. for a total of 1784 lbs. The barrel is so well balanced on the carriage that one man can pick up the trail and move it very easily on pavement. Grass is harder but it can still be done. I did it all the time with my Parrott Rifle and it weighed a little more. Without a winch it would take 4 guys to get it up on a trailer.
That gun is in the $13,000 to $15,000 range.
It is not safe at all from theft. Chained to a stake is not security. I might even be more concerned about someone firing it right there. A projectile could easily go a mile.
Left sitting outside on the grass, those wheels will be growing mushrooms in 2 or 3 years. Paulson Brothers make an aluminum carriage for outdoor display but it is pretty pricy.
Its still very cool!
Zulu