I did an axle flip on my T26bhxl and have thought about the triple step a couple of times. I carry a step, one of the nice $78, 4inch aluminum ones it folds up and fits nicely right inside the door with our out-door mat. Also we carry 4 ˝ inch blocks(3-2x6 screwed together) for all stabilizers. We do not always use the extra step but is much more comfortable when we do.
On my last TT I swapped axles, a drop axle for a straight axle, giving me two inches and tire size for another inch, three inch total, a new step was only $65 so I cut out the old single step and welded in the double step. Worked great and might do it again(triple step this time) if I didn’t already have this free standing step. It ends up I kind of like having a good free-standing step; I dont carry a ladder and having the step helps with window cleaning and and stuff. One issues I would think about is curb-side, if you do a lot of camping or loading curb-side check your final height. My old camper was right at the curb and my new one is good without an extra step curb-side, may not be important but most designs have to be fully extended to use. Another issue is, as you put on more steps your canter leaver gets greater so secure it well.
Please post after your flip and step install its nice to hear about mods and how they work out.