I just wanted to throw this out there for your enjoyment since we are talking about tongue weight and stability. I found a 1991 26 ft “toy hauler” advertised on my local Craigslist, in Idaho, naturally, for $2500. Here is the back of it.... the platform appears to be about 4 ft long by 8ft wide.
A 2x8” wood board (DRY) weighs 2.6 lbs per ft, so there appear to be 48 board feet, or 125 pounds. Assuming they aren’t completely waterlogged.
How much should we add for the 10 feet of steel angle iron frame extensions Bubba welded to his frame..... another 60 pounds?
Then the builder brilliantly stuck his 50 pound spare steel wheel and tire all the way out there on the end.....
Wonder what toy he carried?... You could neatly fit a small atv on it, say 500 pounds.
Now, what is the tongue weight? Zero? LOL.... if you look closely you can see a big wheel sticking down under the left rear corner, presumably there is a second one on the other side, to keep the frame off the pavement... imagine smacking those wheels into a severe dip at 60 mph. The forces exerted on that rusted out frame are stunning to think about.
Sorry for drifting off topic, it was just a way to point out that common sense should always be applied to everything about your trailer.
John Davies
Spokane WA