I haven't set one up yet because I'm working on finishing their new run and being done with the construction in their pen. My rooster is having fits and we walk a fine line daily while I'm in there. I need it done. But when I do set it up, I will just have a bottle of 2-octanone ordered at work that I'll pay for. A 500 ml bottle will last me the rest of my life an cost about $65.
The only thing I vaccinated my flock against was Marek's. I don't believe that just because a vaccine is available that I should automatically give it to my bird, dog, cat, horse, whatever. I vaccinate based on severity of illness symptoms and likelihood of contracting the disease or if required by law (rabies).
Most of the vaccines that are available for chickens are used in the commercial industry because the birds are kept in deplorably overcrowded conditions and the spread of disease moves like wildfire when an outbreak occurs. I don't practice that kind of chicken husbandry.