I don't know anything about the dosing, but generally a single dose of a mAb goes from between 1k-15k from what I've seen. The covid mAb from illy lilly is $1300 at cost per dose. Pricing could drop but I would take whatever the dosing was on the monkey's and multiply that by about $1,000-2,000. Usually this isn't a big deal because almost every other indication of a mAb is covered by insurance and the out of pocket payments are the coverage less deductibles or rise in co-payments.
As a poster said above, if the results are so good that they can do better then a transplant would, then expect similar pricing.