Lower the height of center console

I think you've got the right idea. Decide how high it has to be, cut out the middle on each side with a hacksaw, leaving equal lengths above and below. Measure the inside diameter of the pipe, buy a corresponding Steel Rod or threaded Rod at the Home Center or online, cut two lengths that will span from curve at the bottom to curve at the top. If the fit is inadequately snug, which it is likely to be if you can't turn a rod down precisely, epoxy (The Mariners duct tape)

How much clearance do you need? We had a pontoon boat that we would have to let some air out of the trailer tires to get it under the house. It wasn't much of problem because the pontoon stayed in the water all summer. So we only had to do it twice a year.

I’d have to search for it, but I feel like there’s a bar that folds down. Similar to what you’re thinking, pins back into place. I know there are fold down t-tops so I bet there is one.

Modifying the windshield maybe the best approach.....

But 2 things to maybe look at: 1) what would it take to raise the door to the garage at the camp?

2) At the camp, could you "dig" out a low spot so that the trailer tires go down in a low spot just as the windshield passes under the door.

Just thinking outside the box. Is the windshield only 1 inch too high or more like 6 inches?

I like the idea of lowering how the boat sits on the trailer. The metal brackets might could be lowered and maybe a couple of inches could be cut off the wood runners.

Look at how Nautic Star has theirs, windshield is removable and grab bar can be lowered.