Awesome job! Grinding CUHOF for mirsal tokens was my first thought of how to get an apartment. It would take maybe 30 days of 4-8 hour grinding?
I have been busy lately trying to keep the ball rolling, but even the small apartments on Toulan I think are generally phenomenal.
Best to your endeavors with the Apartment and in Entropia.
So a couple of notes about my grind. It was about 6 or 7 weeks, but It was far from all I did. On average I was running the card missions (at least Shamsdar and Baydar) 3 times a day, and CUHOF 1 and CUHOF 2 also 3 times a day (1 key each). I ran the bigger CUHOF instances rarely, as the cost per run is too high, and the increased Mirsal return is too low. I also did regular hunting, so I wasn't cut off from occasional big loots, and I was harvesting a lot, as well as crafting, mostly textures and furniture. The balance between running instances and doing other activities at any given time was guided by Mirsal drop rates. Harvesting, in particular, was a nice antidote to feeling like a cave-dweller.
If Misral drops felt too low (below average amounts) or too infrequent (only 1 in 3 boxes) I would do other things. If the Mirsal drops felt strong (above average amounts and almost every box) I would run more. I found these tactics yielded Mirsal most effectively/sustainably while preserving my sanity. In the end, all I had to do was hold aside 400ped worth of loot (40k tokens) over the course of the grind, which is not really that much.
I used keys because I had a large inventory from long ago, although recently I had to craft some more. That saved my Nawa Cells for the card instances. The shorter instances provide more loot events, thus more opportunities to loot a page, and quicker feedback about Mirsal drop rates. Nothing was more disheartening than completing CUHOF 4 or 5 run and getting 0 Mirsal. A run through CUHOF 1 with 0 Mirsal was just a blip.
Now that I am done saving, I am still running instances. The markup on tokens is too good to pass up.
Peace, Miles