For me it came down to usage. If you move a lot and put a lot of miles on it, then a MH would be a good choice, although either would work. But if you are actually on the road a few days per year and only put a relatively few miles per year, the a 5er would make more sense.
In our case we spend 3 to 4 weeks in the RV each year and of that only about 10 days actually on the road. And that amounts to about 2,500 - 3,000 miles per year. So traveling 10 days each year and sitting in one place 355 days, a MH just did not make sense to me.