Hmm, perhaps we can answer this puzzle.
The Facts (maybe):
- You plan to use 50 pegs for 50 facts over 6 days.
- You’re thinking that will settle those facts in long-term memory.
- You’ve considered using two sets of 50 pegs, making for a total of 100 unique pegs.
- You’re doing a pretty good job of remembering the first 50 facts you’ve memorized so far (under 10 minutes).
- You want to prevent forgetting the previous set of facts after 6 days.
- And you have the time available.
Did I miss anything?
—Hoping that I didn’t and continuing…
Legitimately having time available, that puts you in a strong position, I’d say.
Another thing that’s on your side:
- Having lots of diversity and variety in your system.
However
But extend it further.
It will be harder to forget something the more unique pegs you have available.
And yet another thing, you’re half way to having a 00-99 number memorization system.
Once you knock out the other set of 50, your 00-99 system will be exactly as long as mine, LOL. Although, since almost all the “pegs” are characters, I’ve given many of them actions.
If every character has a corresponding action, now the list can handle 200 different values:
- 00, 01, 02… through to… 197, 198 199.
And to extend them even further..
..if I get creative and playful with it, I can put the same characters in different locations.
As long as those locations end up changing how all the characters would be/exist/react, it’s a different set of pegs.
In fact, once you have memorized where each peg sits in a location, you can begin forgetting the pegs in the locations.
You won’t need the pegs. 
You have the order of their locations.
If you memorized all the pegs on a specific, orderly walk around where you live (for example), by picturing them always at the same place (a nearby pond or pool, for example), now that pond or pool is associated with that peg number.
You can just use the “walk” in my pretend example as it’s own set of pegs now. Then you might memorize another 50 facts.
Then, every time you review an Anki card (so you don’t forget the facts long-term), you remember the location as well. You just have to picture it real quick.
Do that a couple times and you have several hundred available pegs, all different and easy to remember.
You leveled up.
Now you’ve leveled up your strategy’s Memory system.
Now you can hang onto a total of 200, 300, 400, ..?? facts at the same time while you wait for them to take root in your “long-term memory.”
How? Just review those Anki cards.
Reuse / Recycle:
Eventually you’ll know these things so well, you can recycle all of your pegs if you see fit.
This isn’t very important, but you’ll also end up with more pegs anyway as you memorize more things.
…
This makes sense to me, at least. I’ve done this.
If you have time available, your plan can be extended to get a lot memorized.
These are just ideas (although I use these ideas), but hopefully not all of what I’ve shared will be tossed out the window and ignored. 
You have a cool opportunity. Roll with your plan, and consider allowing yourself to take the easy way of extending it:
- Once you have 100 pegs, you only need to find different locations to put them all in order. Then for every location, you’ll soon have another 100 pegs.
That adds up fast. And gives every additional fact a lot of extra time to get burned into long-term memory.
Sound absolutely terrifically horrible? 
Edit: realizing I never explicitly stated this, but this ends up being, officially or unofficially, the memory palace technique.