We also considered Class C vs TT back in 02. Decided on Class C with 2 young children, costs of truck and TT and towing was an issue, minimum Pickup 3/4 ton. Class C advantages already mentioned but TT has more room. Our Class C has 2 slides, helps with room but heavier. Ford E450 V10 is a beast, great engine and chassis. Still going strong after 19 years, DIY mechanic and maintenance and repair is key, I like tools. Personally I like buying new since I keep it LT from quality manufacturer, avoided trading up. Never needed to tow a toad, Class C 30 feet is nimble enough, used bikes for exercise. Never had a TT so unable to comment.