Sounds like an inexpensive experiment at this point. Maybe somebody will actually try one. Yea 2.5" monitor is a bit small.

I've got a Hitchcam with a 3.5" color monitor and that works well. Cost was $1100 installed at dealer. I just took it in for a oil change and they installed it that day. No fancy wiring other than a video cable, plug and play for dealer (yea at a nice profit of course, but it works). Since I didn't want NAV and I liked my Monsoon system as-is, this was a proven solution that works for sure.

S.