Kind of a short two weeks ahead of us to get anything done or even get answers, but…
- call BigFoot and ask for their recommendation
They are the most affordable. And many E350 & E450 chassis use them. I’m guessing you can get set-up for under $4k. (Prices are up everywhere)
Here’s their website:
The Official Website for Bigfoot© Hydraulic Leveling Systems
Also, you can get an estimate from Camping World. That will at least give you an expensive option. They tend to use HWH and would cost in the $6k range.
Probably best to go to a CW and walk thru it at the service counter.
Finally, go to your local RV dealer and walk thru your options with them for another estimate.