Separating plant extract from ethanol solution
Free evaporation or using a water bath ?
Both ethanol and water evaporate at any temperature, just with the exponential-like rate. ( Washed clothes will dry up even at freezing temperatures ).
If living in area with currently cold weather, consider using evaporation on the central heating radiator, parhaps partially isolated.
Free evaporation could be a safe bet, but slow evaporation can support oxidation of dissolved substances, so I would try both free and heated ways.
I remember that in my young-chemist days, I had bought a water stream vacuum pump, based on the Bernoulli equation.