The bh connections I'm familiar with are on used machines so not worth changing. Connecting to already installed remotes might be cheaper don't really know on the machines your considering.
Dead heading is simply cutting off the oil
hyd pump circulation path by in my case detaching the bh and not reattaching the dozer hoses together. The 40
hp engine stalls.
ISO = International Standards Organization. Old tractors had proprietary connectors & would not interchange. The old Deere tools I acquired plow, bush hog, etc. I changed to the standard ISO - Pioneer is a brand name.
Trailering is a constraint. Fender interference was my maintenance problem. Smushing & crunching the fenders when loading and unloading would cause the inner splash guard to rub against the inner tire sidewall and eventually blowout a tire. Several attachments are wide enough to sit on the fenders.
The friends & relatives I help are within 5 mi or so I just drive the tractor. The tractor weighs 10K lbs itself. I had the wheels set 84" wide due to stability on hills so it would not fit on the bobcat trailer anyway.
Time to start test driving machines to get a feel for how tippy they can be especially when toting something. Smaller machines are worse than larger.