I don't have that exact pool, but I hope this is a bit helpful. I talked with and got a quote for a semi install of a wilbar optimum. The optimum looks to be the same pool as the radiant (same wall design), but is less expensive. The install was for a 24 foot round, 22" in the ground, vermiculite pool base, stone backfill. $13,600 (sorry it wasn't broken down). My install didn't include the concrete collar bc it was less than 2 feet in the ground. Putting it deeper in the ground will increase the cost quite a bit...more excavation, more dirt to move, more backfill, concrete collar. When I asked about putting it in the ground almost 3 feet, it increased my price to $16,000. Like I said, I know this isn't your pool, but I thought it might give you an idea of how expensive it is to put in a semi.
To compare: My cousin is in the process of putting a vinyl liner inground. 16x32 that will be 3.5 to 6 feet deep. Tanning ledge, grey steps, coping, returns. (I'm not sure how much concrete around the pool besides the standard 4 feet around 8 feet shallow end) $28,000. Given the quote I got on a 24 round semi, I've already contacted her builder to get an inground quote. With the semi I wanted to get, once I add on the deck I"d probably be at around $20000. Of course, if I ordered the pool online and did the install myself, hiring out parts I can't do, I'd come in cheaper, but I'm not sure how much cheaper.
I called a Radiant dealer about 100 miles from me (there's not one closer to me) who was willing to price out a pool on the phone and then ship, so you might want to try calling around, not just the one who is local. I hope you get more responses. I've not yet seen a freeform radiant install on this site, but there are some Radiant installs you can find using the search at the top. Good luck. If you do go with a semi, please be sure to post up your install!