That would be nice. Complete with takedown limber. I would forego the mule team used to transport the taken down rig though.
I used to have one that fired plastic 35 mm film containers filled with cement or half pound lead wad cutters. The wadcutters would go clear through an old pickup body at a 100 yards. Also had a coehorn/mortar that fired cement filled V-8 cans around 200 yards. Decided when I moved to town that I might be a little over gunned, and sold them. Kinda wish now that when all of the neighbors start shooting of fireworks a week before the 4th that I still had them. One shot would quiet things down pretty quickly.
As much as I want a cannon the words “barrel was fabricated and welded by myself” scare the crap out of me. I’ll be buying one someday but it want be that one. Absolutely no offense to that guy but I don’t know him, but I have known “welders” that were far inferior to their perception reality.
No offense, but my initial though was that the OP's question was one of the silliest I've ever heard, since the obvious answer is YES, EVERYONE! Someday I will own a cannon.
You do need to know the history behind the cannon before purchasing. And before shooting a cannon the 1st, second and third question should be about the builder and what all he/she has has done. You can be betting your eyes and fingers on his workmanship. One of the Greatest of all cannon builders is Dominic Carpenter. He has that unique ability of merging design and cost like no one I have ever seen..
Now your talking. I’ve wanted to build one of these for years. http://www.buckstix.com/HowitzerPlans.htm
The gun linked in the OP has the typical problem of a home built cannon- it looks like an industrial tube. Get friendly with the local machine shop that has a good size lathe and put some taper and form on the OD so it at least looks like something that could be viewed as authentic.
The ad said that the cannon was fired but doesn't mention if it was with a lead ball or projectile. A 1 3/8" lead ball would weigh 8.9 ozs. or 252.9 grams, or 3,902 grains. There's a similar size cannon being fired 5 times including in super slow motion after the 8:10 mark in the video.
since the ad says "sounds off with one shocking report" but no projectile was mentioned, I'm guessing it's never fired a projectile and is just intended to be a boomer.
I like those, What caliber is that Dahlgren style cannon???.. I like that... And Sir.. please "No thanks, I'm full up" I bet you have a dining room table you could get rid of for extra space
with comments like that, some members are going to be inclined to offer opinions of what you are full of... nice collection. What are the bore sizes and/or scales for your thumpers? The mortar looks quite small whereas the naval cannon and field artillery pieces look to be small but larger in scale than the mortar.