as said, evaporating the mimosa tea will leave you with way too much gunk appart from dmt.. plus when you make a paste of this evapped stuff with sodium carbonate, how are you going to pull dmt freebase out of it?
also the amount of water to evap of the original tea is quite a lot, will be a lot of time and energy..
the dlimo extraction, the dmt is salted out of the limonene because limonene dissolves dmt way too good even at low temps, so it cant be freeze precipitated, and it doesnt evap clean, it leaves too much residue.. So the solution people found is to salt it out with fumaric acid solution or just vinegar, and then evap that instead (which will be mostly alkaloids, not much gunk anymore), to leave either solid dmt fumarate or gooey dmt acetate... then, if one wants freebase, make paste with sodium carbonate and mix, let dry, and then pull this stuff with IPA or acetone, and this will pick up the freebase alkaloids and leave the rest behind, filtering the IPA/acetone and evapping it (for example any sodium carbonate contamination will stay behind).