I'm a SAHM, quite comfortably so.
I have always been in paid employment since the age 14. I stopped working at 34 after 11 working in a profession to middle management level.
I found it hard to relax actually not working the first year. I've since had my second dc, which was and is completely different to the very stressful time I had with dc1 when working. TBH I don't think I would have conceived even.
I'm happy traditional roles at the moment, it works for us I feel I emable my DH to go out every day and work long hours in demanding job. He had the opportunities and greater earning potential, he could not do his job if I did not do his share of parenting.
I'm happy with this as DH used to be primary parent as he worked less hours than me previously and did more domestically on a daily basis. For us it has been a case of interchanging when needed to do so in response to circumstances.
Sadly I also had the benefit of a temporary separation, things got pretty bad, so I know how vulnerable the lower/non earner can be financially speaking. I don't think I could hop back in to a middle management role but I could do some consultancy and earn decent money to support myself and kids, though probably not to the level we live at now.
Throughout this I have been studying a part time degree which I feel is an investment in my future and will offer broader port unities when I return to work. I have also found it very nourishing to do this aside from the baby groups etc.
So in all I've been on both sides of the fence ft/pt and I found each to have its benefits and drawbacks for your chilld, family, yourself. It just think its important to do what's best for all three based on what choices you have available,a d I know some have few or none.
I do intend to return to work and will earn less than what I would be had I not had the career break and I know my pension is reduced and currently dormant. So there still lies the inequalities as I see it, but I'm pleased I have something behind. Having said! that, like many in my generation have had babies later, I will need to work longer and know I might not be in as good health when my grandchildren are born.
I don't think a best way exists.