If its got question marks then, at that age, don't buy it - IF its good then IMHO 40-45 is unrealistic 45-50 is probably more like it
Is there more work yes but not a lot unless you just want a floating flat and that is your base line
There's NO vibration if the engine is right but you do have to like the sound and see that as a positive
Using trad (twin) controls is again a joy or a curse depending on your viewpoint - to me it completes the package
This boat isn't for everyone but it looks a beauty to me esp with its pedigree - research, try it, then survey/survey and survey again!
Have fun