Step 1 – Extraction: (Base / Non-Polar) :

Mix 300 grams NaOH into 300 ml cold water, stirring constantly. Let cool. Pour into jug.
Add 100 grams dried powdered cactus to the jug. Mix well.
Add 1 liter limonene to the jug. Shake and roll to mix well.
Mix occasionally over the next 24+ hours as the lye breaks down the cactus.
Allow enough time for separation into layers before proceeding to the next step.

Step 2 - Salt: (Acid / Polar) :

Prepare acidic solution by adding 60 ml of water and 7 ml of 30% HCl solution to the limonene. Mix thoroughly.
Collect top limonene layer from the jug, putting the limonene into a new jar.
Add the prepared acidic water to the limonene jar.
Put the lid on the limonene jar and shake it up a few times. Wait a couple minutes to settle.
Collect bottom water layer using a long dropper, putting the water into the evaporation dish.
Return limonene to the cactus solution and mix for another 24 hours.
(Optionally, you can add 1 Tbsp NaOH to the jug after the third extraction.)
Complete 5 extractions over 5 days to use all of the water.

Step 3 - Evaporation:

Pour liquid into a flat-bottomed glass dish under a fan in a low humidity/mild temp environment. After a few days, scrape the residue from the dish and powder using a razor blade. The powder will continue to dry over the next few days. Makes 3-10 doses depending on potency of cactus and dosage desired.

Another thing, you won't get pretty sharp crystals from this. They'll be flat, smooth, and not very intricate. That's just how Mesc. HCl does it's thing.

It's probably fine. Your first pull or two will be the dirtiest. I have been doing almost the same process, myself. I've found that the first pulls are the dirtiest, then there's a nice peak where the pulls are almost clear, then the yield of each pull starts decreasing, and no more crystals form.

Another thing, you won't get pretty sharp crystals from this. They'll be flat, smooth, and not very intricate. That's just how Mesc. HCl does it's thing.

And as for yield, I can't say for sure about limonene, as I've never used it, but at least with xylene mescaline is not very soluble in it. It's taken about 6 pulls off of my latest batch before I started noticing diminishing yields from each individual pull.

Also, you may just have weak cactus. It's pretty common. When you get a good one, be sure to cultivate it! There is a difference between the predominant cultivar, and less common, often stronger ones. You can read about it here. Not all PCs are totally weak, but they tend to be on the lower end.

Collect bottom water layer using a long dropper, putting the water into the evaporation dish.

for the amount youre working with why not just go for a tea/simpler means of preparation?

I read in some places, the mescaline experience is not the same than the cactus experience.
I wanted to experiment it by myself.

So I've performed 7 pulls, the result appearance was almost the same every time, just the quantity was different.
I've performed 2 cold anhydrous acetone wash. The product wasn't sticky, but still very brown.

And the yield was... 55mg.

I think I've got a weak cactus, so I give up from now.