What kind of towing vehicle should I get for a 26ft bnkhs

As others have said, get more truck than you need. We started with a Jayco 26BH and towed with a Yukon XL (5.3L). It was a struggle, and I'm sure I was right up against the limits with loads. The 26BH ended up being too small for all of us (3 growing teenage boys and two small dogs, with no slides...), so we upgraded. Always have more truck than you need.