A quart of limo is more than enough to work your way through a kilo of bark, and its rather easy and possible to reuse the limo. You just have to wash it in basic and acidic water a few times. I don't imagine you would need any more than a quart of limo for what you are describing, and my advice would be to get a quart and save some cash for the other things you need to extract. You seem to know what you are doing, and props to thinking the process out before jumping in ballz deep. Good luck with your extraction!
Edit- as an example, i prob used 75-100ml of limo for my 100g extraction i am finishing up on. I just salt out the limo with fasw, and then put it right back in the basic soup. Repeat 3-4x, and your limo will still be pulling dmt just as well on the fourth pull as the first imho. Then you just wash it with koh/naoh water, then an acidic water (acetic,fumaric,hcl,etc) a few times and it should be ready to do another extraction with.
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