Old Vs New Rig

My first rig was 19 years old (1985 purchased in 04). Second rig was 22 years old (1997 purchased 2018) with roughly same mileage. 34K miles. First one was updated with all new rubber, tires, hoses, belts and fluids when I bought her. She ran like a champ and I just kept the roof sealed, replaced stove and coach water pump. Had her 16 years camping on weekends and holidays, she sat for 2 and a tree ended her life. Fell right on the bed over cab portion. My 1997 Holiday Rambler was a great build year on same chassis as yours (F53), with Ford 460 engine. Both were high quality builds. I really like Bounders and the ones I know of were well equipped. Their paint was a bit rough in 80s and early 90s and they chalked and faded to a pinkish color but that can be restored using Zep floor sealer and polish. I've used that these past 7 years on both and it is a no rub, no buff, no yellow finish if you follow the correct applications of 4 light coats. I think the V10 can pull 5K total...but loading it with 5K exceeds the trailer hitch rating. Now if you can add electric brakes to the trailer I think you may be able to do it. My very first pull behind was a 69 Barth Junior (bought in 1996). Those electric brakes were wonderful and I actually used them to slow me coming down grades in Wyoming. I would not want 10K pounds pushing me from the rear. I will say the one thing drastically requiring replacement in my 97 Holiday Rambler was every brake component. And that was pricey. $3676 plus an additional 1K in other stuff. The rubber lines rotted from within. It stopped fine in the neighborhood. But above 45 to 55 mph? I roasted all the components. That was not a happy day. But now I have great confidence in the brakes. I freshened up the interior for 1K. I think I now have 36K miles on the engine and transmission. Plenty of life left. When I get it registered and inspected next I will replace transmission and coolant. Otherwise I've only had 2 oil changes, one cracked pipe and a ruined valve due to the freeze in Texas. I think they were much better built in the 90s.