This was the dilema I faced when I changed to the Drifta kitchen. I bought one of those red Primus stoves, because it has the highest BTU rating of any of the portables, as well as a two burner cast iron hob. The issue with the Primus stove was not that the hose doesn't reach the trailer, it doesn't even reach the ground, so meant that the gas bottle has to put on a box. I had spent a week trying to get a longer hose, only to have it explained to me that HP stoves cannot be more than 1m (~1.2m?). Bugger. I had already sold my old LP stove to Lost.
The cast iron burner was excellent, but the legs were too long and so did not allow the lid of the Drifta kitchen to close properly. I mucked around and considered how to make shorter legs, bought some steel and said "stuff it, I already have a two burner Jackeroo stove" which I've been using and it works a treat. I reckon with some work one could make a box to hold the cast iron burners nicely, lined with heat reflecting material to protect the wooden kitchen. They're so inexpensive and reliable.
There are few options when it come to LP stoves, and they're all expensive.