First off, I'd just like to say how much I enjoyed the nectar making guide, I was frustrated with nectar making, but I feel like I'm ready to give it a second try now.
There is one thing I found that could be added to the guide. "Nectar Makers can't be cloned with the Sims 3's eyedropper tool once at home, but the racks can, so you can get by with one"
It is true that the racks can be cloned, but there isn't any need to, as you can buy them from buy mode.
Go to storage>miscellaneous and you will find all of the kinds of racks.
Additionally, there is a cheat in World Adventures called "buydebug". It can be activated by typing "buydebug on" (and deactivated the opposite way).
It allows a new type of catagory to buy mode, it includes spawners (seed, fish, insect etc.) tomb items such as sarcophagi, flame traps, dive wells and adventure coin piles, as well as a miscellaneous tab that includes registers (so you can have general stores in Sunset Valley), as well as nectar makers and martial arts equipment.
I don't know if I'd recommend the nectar makers, as it is very satisfying to get one from France, but it's very nice to have a general store, and you could use the sarcophagi to get a mummy sim. I haven't explored it a whole lot, but from the 5 minutes I played around with it, it seems to have a lot of potential, particularly for player-made tombs.