Something things to consider. If you plan to finance, since the MH has the engine and is self contained you can normally get a better "package rate" on your "house/RV". If you go the 5th wheel or TT route you will get one rate on you 5'r/TT (similar to a house mortgage) and a separate loan at a different rate on the tow vehicle (car loan rate). So for the same monthly payment you might get a better deal on the MH.
Also beware of sales men and their opinion of tow vehicles. Many of the larger 5 wheels will require a 1 ton pickup and often a dually. Read the spec's of a given truck carefully. If you own a truck, know what your specs/limits are when you look for a 5th wheel. Look at gross weights not empty/dry weights, Also make sure you truck can handle the pin weight. Older trucks tend to top out at 20,000# gross combined weight. Newer trucks are a little higher but it depends on gas or diesel and if it has the proper tow package. I found the 5'r I wanted and then bought the truck to match. 5th wheels in the 14,000 - 16,000# gross weights (10 - 12,000# dry) are not uncommon. There are light weight trailers(8,000# dry / 10.000# gross) but they tend to have less options. If you want the washer/dryer, 2nd A/C unit and other options that make life nice, your looking at 14,000 - 16,000# gross trailer (pin weight 20%, 2,800 - 3,200# plus hitch weight of 2-300#) and an F350 / 35000 series diesel/dually to pull it (8,000#) 22,000 - 24,000# gross. If you don't like dual's be careful of your rear axle/tire ratings. When you look at tanks on the RV they add weight quickly. I have a fresh water tank (53 gal) 2 blacks (80 gal) and 2 grays (80 gal) = 213 gal x 8 #/gal = 1,704# (adds to gross trailer weight)
Truck + Camper + fuel + passengers + hitch + your stuff (1 - 2,000#) + liquid in your fresh, gray and black tanks, etc = gross combined weight (GCVW)
Example: rig in signature, the 3 of us, water tanks empty, full of fuel (39 gal) I scale out at 19,500# gross. We are pretty average for a 5th wheel.
At 6' tall I found I liked the room of a 5'r best. Also I like to be able to drop the trailer and run around in my pick up. As my hitch cover states "Sill
y boys, trucks are for girls."
Whatever you decide, enjoy the journey.