I tought so about doing that myself but its not practical.
The plant matter is too bulky, you would need to do a few extracts and then melt it in the alcohol for it to have any reasonable poteny otherwise you would end up getting shitfaced drunk before feeling light mescaline intoxication.
Better yet extract just the mescal so you know your dose or stick to the tea.
I would recomend the tea, as nasty as it may be it is still the most cost efficient.