Congratulations on your retirement and your soon coming trailer.
We just picked up our 5.0TA at the beginning of October and love it.
We got many options, including all of the solar/electrical, all of the insulation, lots of extra outlets, all the optional plumbing valves, the oven and the u-shaped dinette with a smaller table. We like them all.
The only option we got that I am not still sold on is the King antenna. It works great, but increases the maximum height, and so far we haven't found anything on the air that we want to watch. TV-ready with the campground cable hookup would have been a better choice for us.
You will find a lot more good advice in other threads on this forum.
Gary & Peggy
2017 5.0 TA "Wandrin' Star"
2016 GMC Canyon Duramax