My dog is homeopathically vaccinated - costs very little.
Costs - well, I have only 1 dog and from the start went raw/BARF ... I think it would work out more expensive if you're comparing like for like, but in the long term, it would be much cheaper - as it would save on vet/surgery/ill health bills.
It's a long term view.
However, my dog never over eats on BARF, whereas, with all the chemicals added to commercial pet foods, it's easy for a dog never to know when he/she is full.
My dog naturally does not want toeat 1 or 2 days each week - in the wild, canines rarely eat daily, and the natural fasting must help with all sorts of digestive issues.