Tbh, I fail to see why there should be an extended downtime for a full reset if they're going to cost money in the first place. At worst I'd go with 24 hours, and ideally 2 hours.
Given that the major reason behind a full reset is gear, why should we be forced to wait pointlessly on our arses simply because of an unncessary timer? Make the fee high enough to discourage abuse and eliminate the timer entirely, or at the very least make the timer something that isn't ludicrous. 2-6 hours should be quite sufficient if you absolutely *must* have a lockout.
As it is, there are already too many pointless exercises of annoyance in waiting periods that ought be dealt with, such as the ridiculous equip time on most belts. How much of an invalid do you have to be to take over a minute to put on a belt? They serve no real purpose beyond the annoyance they cause by forcing the player to wait. As the saying goes, "It's the little things that kill."
As for fees, something between 25-200m per full reset should be sufficient; this is a luxury and as such the fee should require an appropriately scaled price based off either titlelevel or total number of perks. Additionally, an option to pay the fee using VP as an alternative should also be explored, perhaps a VP cost scaling from 1000-25000 or some such (these are just arbitrary numbers folks, put the pitchforks away).
Anyone who wants to use the "experimentation" argument could do well to remember that iprs cost upwards of 200m (depending on your complit ofc) or a nice chunk of vp to procure after your initial batch is used up; it isn't as if having a currency hit for the purposes of experimenting is anything new.
This is a nonessential time saver, anyone not willing to pay the fee can just as easily use the normal perk reset method and avoid the hit to the wallet.
And as for the "what of the poor people" and "oh miserable me, for I cannot possibly accumulate said money as it is just too difficult..." people, money is not hard to make in this game. It boils down to what you are willing to invest in time, and the methods you use to make that money. There's a ton of ways to make money, if you stop thinking in a narrow minded fashion and look for the opportunities.
If you're not willing to invest the time to pay the 'modest' fee for a perk reset, you don't need it. In a game where a set of endgame ai armour runs in the billions (and that's not even counting what you'll spend on other gear if you don't farm it yourself) the idea of something like 25m-200m is a drop in the ocean.