What's a good price point for this?
What will the enclosure be rated for? NEMA 4 or 3R.
Will you be getting it UL or ETL listed?
Any chance you'll ask Toyota to add your charger to the list of "approved" Rav4 level 2 chargers?
Comparables:
The Toyota approved, NEMA 4, UL listed, 40A Leviton EVSE retails for $899.
ClipperCreek makes a NEMA 4, ETL listed, 48A EVSE for the same price.
ClipperCreek's NEMA 4, ETL listed, 32A EVSE retails for $590
EMW JuiceBox EV Basic, "Weather-resistant", 40-60A EVSE is around $499
ClipperCreek's entry low-cost NEMA 4, ETL listed, 15A EVSE retails for $395
JAMP JR pricing summary (assuming NEMA 3R/4 rating and UL/ETL listed):
<$395 : why buy anything else?
$395 - $499 : disruptive to the big brands
$499 - $590 : mainstream consumer price range
$590 - $899 : niche product for the right customer (10 kW charging, non-Tesla)
>$899 : not interesting
Breakdown:
If you are getting the device listed and have a NEMA 4 rated enclosure a price between $590 - $899 seems reasonable.
Without being listed, I'd think you'd need to be in the $499 or less range.
If you could be priced $499 or less with an outdoor enclosure rating and UL/ETL listing, you'd have a very disruptive product.
However, if your price is much above $590 your limiting yourself to Rav4 and B-class owners who get value out of having a larger than 32A EVSE. There won't be many more new Rav4 EV, so you'd really be left with B-class owners until you came out with the dual charger mod for the Rav4 EV.

The next OEM car charging around 10kW would probably be the 200mi+ 2017 Chevy Bolt (not Volt).
If you were around or under $590, you'd be competitive offering for more vehicle owners and would probably get selected the just for having the largest Amp rating in the price range for "the next car."
Personally, I went through EVSE selection twice last year - once for my Rav4 EV and once for a family friend's LEAF (6.6kW charger on-board).
I went with the Leviton for the Toyota approval, charge time (40A), and NEMA 4 for mounting outdoors. I pulled the trigger when found it on sale from amazon warehouse for ~$700.
The family friend went for the 15A ClipperCreek for the lowest cost NEMA 4 rated model for outdoor install. He figured he'd be plugged in all night so the charge time mattered less.
In both these cases, there was not a garage option, so the enclosure rating mattered more.
Hope this helps you dial in on a price!