It may work, one person has tried it but it seemed that his lime was bunk.
SWIM has only done 400g at a time and it worked fine, mixing was a little bit strenuous at time.
A 10L HDPE bucket would probably work best, to eliminate splashing.
In either case ALWAYS test a small batch (as small as 30g if you want) to make sure your materials work before upping the anti.
That being said, whenever someone asks about a 1kg extraction I think "who needs over 10g of DMT?"
SWIM looses interest in depleting his extractions since he has about 1.6g of white DMT, 2.3g of full-range and about .45g of "jungle"
He used to have much more but he avidly GIVES it to people because it is so overwhelmingly much for him...
Nonetheless if you do chose to DO A SMALL TEST FIRST and you can PM me with questions/concerns/pics

Q21Q21's Tek: A comprehensive guide to extracting DMTThe 2 teks use non-toxic lime and vinegar and Tek 1: d-Limonene or Xylene or Tek 2: Naptha to produce very quick high yields with the greatest of ease.I am almost never on this site anymore so I will likely not answer PMs