Barge to carry a single pick-up truck

That alone sounds like a good enough reason for having your own landing craft.
Go for it!

 

What appears to be a pole in the picture are "hammer leads" for driving pilings using a drop hammer. Drop hammers used to be everywhere, today they are being outlawed (due to underwater noise) in favour of vibratory hammers.

 

Realistically a loaded landing craft will only meet ISO Category C requirements and that standard will limit your operations. TC doesn't "decide" anything, they approve or deny your submissions. The boat will have to be designed working to the Cat C standard. An un-maned barge will avoid this certification, though TC can limit or halt voyages it deems unsafe, this only comes up if you're doing something really dumb.

 

So for the original SOR. Looks like the LC will be a couple year's pay and that's a ways off. My original thought is back. The 33' by 12' landing barge to be pushed by Serenity. I can make it for about 30k, in two months. I know glass epoxy on wood, so that it will be. Scantlings... I'll have to have someone weld up some landing skids. Glass can't survive a landing on these shores.

 

Going back to reread some of @baeckmo 's posts early in Sea Sled Information he mentioned a number of barges used locally that are sea sled hull form. Presumably the NA's who designed and built them had the qualifications necessary to make such a judgement. So there must be something there. If they were failures I doubt he would have mentioned them.

 

Who designed them?