Thank you for all the replies as it gave wife and I a lot to discuss.
We had just decided to stay small with something like a Lance 915. This would allow us to comfortably stay with a SRW and continue our small backboard exploring.
Then all of a sudden a deal to good to be true seems to be headed our way. At 5,000# loaded, this will require a DRW truck for sure. So it looks like my wife may get her wish for a dry bath on a B.A.T. after all.