We don’t have yet a price defined for it. We really would like to have it cheap for everyone, but it is being in R&D for so long and we need to be realistic. We will apply to Unreal Dev Grant and if we win we will compensate on its price making it really accessible for everyone.
As for time to market, all depends on the release date of UE 4.23 and the time to make the changes to the source code to deal with the rendering module changes that will occur.