From my perspective: there is a very real chance that, with your guidance and parenting approach that your children, even without the steiner school, will have access to ethical, nuturing and inspiring education. Having you around a bit more will help compensate for a little less immersion in the school environment. having the extra finances is, a necessary component in helping to create a more harmonious home (money stress can be really hurtful on a wholistic level IYKWIM).
Totally agreed - Personally I would go for option B, because I would want the time and the finances to be involved personally as much as I could in their development. Also schools change over time even Steiner schools so personally I wouldn't want to invest that 'heavily' in a school. My brothers girlfriend went to a few Steiner schools as a child and didn't always have the best time, seems there was a certain rigidity in their methods which didn't always suit her. I suppose what I am trying to say is you can't predict exactly what your children will be like and what will suit them as individuals (My cousin sent her DD to a private grammar school for her kindy year with the intention of her staying there, but the way enrollments went and people leaving she was the only girl in the class and would have continued to be, and started to really dislike it, so has now started at her local catholic school instead) so I wouldn't want to choose a specific school if it was to the detriment of other things because you just don't know what the school will be like in 8 years say or what your kids will be like - but you know that you as a parent will be able to be flexible to meet their needs and assist in their development - so I would want to keep the time and the finances for that.