Hi: Elizabeth... I'm probably not one to talk with any certainty as we have only had our "Escape Hatch" for less than one year...but I can answer some of your questions.
We have a Husky 16 slider 5th. hitch was $1200.+ install. The trailer clears the truck by at least 4" on a tight jackknife turn so slider really not needed for us.
Hitching up is easier than your Boler
once you're used to it!!! Just a case of backing the hitch to the pin and locking them together
The hitch is sorta perm. in the bed of the truck but it could be moved to a newer truck.
I inquired about a composit bed truck and the top of the hitch could be used but new underpinings to the axle
are required under the box floor. This would have to be custom work.
Maintenance is minimal. We use a Teflon plate on the trailer part of the hitch so no grease required. A good pin lock is vital and we have a soft roll up tonneau cover that protects the hitch when not hooked up!!!
We also have a lockable tool box across the front of the truck bed for extra storage space.
Hope this helps some...we couldn't be happier with our new set up!!!
Alf S. North shore of Lake Erie