It would really depend on what the next best option is IYKWIM.

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).

that said, if the public school that is the next best option, is in fact, not the best option for your child, then it may be worth the sacrifice of time (yours) and money. For example, if there is a real possibilty that your child might not cope at all within the public school environment (and may suffer for it), then the answer is clear. Children still get a fulfilling life and love from parents that work full-time. and if this creates the necessary harmony and aspiration of dreams in your home, then it is worth it.

It is not an easy decision

All in all, whatever you decide, your child will be surrounded with love and be given all the best opportunities for life fulfillment: something that is not necessary only acheived by where they get there school education.

Goodluck with this decision xx