Roundabout fifty Euro, probably less from the discounters on the net, doesn't seem like a great deal of money for so much technology. The special rims will be a once-off expense.
However.
I've had this tyre's ancestor, the Marathon Plus which, while fast and puncture-proof in my use, was a b*st*rd to get on and off the rim, and rode like a square stone wheel on anything but a mirror-finished road, of which I have none. I upgraded to balloons and never looked back. The very words "touring tyre" make me wonder how much comfort Schwalbe sacrificed for a high load rating and/or longevity.
Also, I haven't had a puncture in around ten years, since I switched to Schwalbe's banded tyres, first Marathon Plus (and before them Bontrager's Elite which is a workalike, possibly the same thing relabeled), and then Big Apple Liteskin balloons, which have a blissfully cushy ride, superior roadholding and handling, and are pretty fast because that heavy tyre builds up its own momentum and it has very low rolling resistance already. Also, they last and last even in harsh use -- I'm the last of the late and hard brakers -- with my rear tyre having survived 7000km before it showed signs of wear; it looks like the set will make 10K, with something left in the front tyre by the time the rear tyre wears out.* (And this is with a high-torque motor in the front wheel! Amazing.)
So I have to wonder where the need for this new tyre arises.
Some people were irritated several months ago when Schwalbe withdrew some very desirable tyres, among them my fave, the Big Apple Liteskin, to make way for new tyres.
*When the Big Apple Liteskins first came out, Utopia, the makers of my bike, were advising and hoping that the Big Apple Liteskins would last 3000km, and telling people to disregard street corner chatter about high mileages with the less flexible plain Big Apple. One assumes they heard that from Schwalbe, but Schwalbe on the other hand advises people to ride the Big Apples until the band shows through. Anyway, experience of the balloons, including the touring balloons (a balloon is any low pressure tyre 47mm wide and up), has shown that 3K is a huge underestimate.