They would all have the same tension, yes. However the highest E string (the one with the most string behind the nut) will feel looser because it can more easily be bent.
Getting a reverse headstock would actually do the exact opposite. The advantage of fanned frets is that tuning the same string to the same note but at a longer scale will require more tension. Any amount of string behind the nut is still going to be under the same tension, so a reverse headstock...
Hmm. . . so with MSRP from $3,265.29-$3,673.43, the closest thing I've found to that price range is the SL2HT Soloist (also USA series) with $3,194.43 - $3,749.99. The SL2HT retails for around $2500-2600, so I would expect the price wouldn't be much more than that!