There is no reason to decarb if you are after the medical effects as opposed to getting higher. Higher doses of cannabinoids can be more easily tolerated without decarbing and the medicinal value is the same or better in it's natural state.
The boiling point of ISO, 82.6C or ethanol, (booze), 79C is low enough that a pot of simmering water under whatever the alcohol mix is in is good for evaporating off the alcohol. Make sure there is lots of ventilation to get rid of the flammable fumes. In the case of ISO the fumes are also toxic tho less so than methanol, aka methyl hydrate, aka wood alcohol that is widely available and can be used for extracting oils but not for use as tinctures. Only ethanol should be used for tinctures.
take the herbs out silly. you dont need boil out the alcomahol just let it sit in a pyrex dish for a few days. then decarb @210-240F for like 20-40min and reapply more yeast pee