Ascender is like a Trailblazer or Envoy, right? If so, stated weight around 4500. Wouldn't be surprised if it scales out closer to 5000. An E450 can/will tow it, but you WILL feel it. Our bare-bones Nissan Frontier scales 4000 and I set up a Corolla we have, 2500, to reduce the load for longer trips.
If you like, if you need, if you can't financially replace, Ascender, it'll work, no doubt about it. I can tell you I'd rather see close to 3000 than close to 5000.
We started out setting up two toads so we got a Brake Buddy to not duplicate the cost of braking systems. We still use a BB.
Started out with Roadmaster towing gear. I call it "Biblical" since it has the Strength of Samson but requires the Patience of Job. Massive, strong, inelegant but it gets the job done with zero worry of failure.
Recently went from a vehicle-mounted folding tow bar to a Falcon all-terrain RV-mounted folding bar. I like it a lot more.
Blue Ox was the class act in user-friendly base plates till Roadmaster brought out their newer series. The new Roadmaster is every bit as easy to use as Blue Ox.
Every major manufacturer (Blue Ox, Roadmaster, Demco, Night Shift) offers ways to adapt to others' components.
Night Shift makes Ready Brute Elite, an "aluminum" RV-mounted folding tow bar with an integral braking system. It's probably as close to "ultimate" as this equipment comes, right now.
I say "aluminium" in quotes because only parts of such bars ARE aluminum. Look at Roadmaster's specs and you'll see the weight saving isn't as much as the name implies.
If God's Your Co-Pilot Move Over, jd
2003 Jayco Escapade 31A on 2002 Ford E450 V10 4R100 218" WB