Cost for the R/C version is as clear as mud, issue 1 does not actually state how much the R/C option kit will cost let alone its Spec, or when this info is likely to advised, and therefore the legality of them not providing this info at the outset has to be in question.
Otherwise, how do you know what the total cost of the R/C version will be, and where you could be a pile of mag's into the build before you are told the cost & spec!
Okay you can go your own R/C route, but for the novice R/C builder this will be unlikley, and will therefore either have to accept the cost, seek guidance or possibly dump the build because of the cost, where the latter means that the sum total of mags bought to date will be an out of pocket loss!