This might be one of those "grass is always greener" scenarios. There are a lot of things to consider. Full disclosure, I'm a stay at home mom, for the past 13 years. I worked prior to having kids, but the plan was always for me to quit and be home with the kids. We are a military family, so having some sort of stable home life was EXTREMELY important for us, as well as knowing how difficult it would be to actually pursue a career with the frequent relocation of military life. We have two kids, and both have special needs (which you never think about ahead of time, but when it happens, it changes everything). It is a good thing we had planned for me to stay home, because in the early years of therapies, doctor's appointments, etc., it would have been impossible for me to work.
However, now that the kids are preteens/teenagers, I have become very, VERY bored at home while they are in school all day. I am getting stir crazy, honestly. However, they still need me home after school and before school, and for various reasons relating to their issues (autism), before/after school care is not an option, and hiring help would be counterproductive, financially. So, I'm basically "stuck" as a SAHM for a few more years. And, it kind of sucks. I miss talking to adults. I miss feeling like I am contributing financially as well as having something that is "mine."
I worry about the future if something happens to my husband. Sure, we have plenty of insurance, but I honestly don't know how I would support our family if he passed away. And that terrifies me.
Now, take the kids out of the scenario. I think I might have enjoyed being a stay at home wife for all of a month before the boredom hit. Even with volunteering, I don't think it would be enough mental stimulation. Not to mention, finances have a way of creeping into the picture when only one person is supporting the household. My husband is FULLY supportive of me being a SAHM, but every once in awhile, he says things like "my money", "I paid for that", etc. And, frankly, I resent that. However, I simply remind him that *I* have made equally important contributions to our family by committing myself 100% to the kids and running EVERYTHING in our household so that he could do his military job without worrying about anything (literally: the bills, the house upkeep, car upkeep, all the shopping, cleaning, doctors's appointments, cooking, etc.)
Then, there is the issue of long term finances, and the possibility that your husband will pass away or become disabled, leaving you to support you both. My uncle was a doctor for almost 30 years. His wife was a SAHM, then Stay at home Wife after the kids went to college. A few years ago, at the age of 55, he was diagnosed with an incredibly rare (less than 30 cases worldwide) autoimmune disease that ravaged his brain. He developed seizures that caused extensive brain damage. He almost died. As a result, he lost a huge amount of his long term and short term memory, has to be on high dose steroids for the rest of his life, and has lost control of the emotion center of his brain. He had to stop practicing medicine and hand in his license. It has been devastating. Anything can happen. My aunt has no marketable skills. They are living off disability insurance payments (thankfully they had that), but their lifestyle took a HUGE hit, as you can imagine.
If you really think you would be happy, and your husband would support it, try it out. However, I would encourage you to at least maintain SOME sort of part time job, in addition to volunteering. Having a huge gap in your resume looks BAD, and will make you less marketable in the future. Also, social security might be an issue...you have to work a certain number of years making a minimum amount of money to qualify for benefits at retirement. I know social security might not exist as we know it, in the future, but you also don't want to purposely leave yourself with no benefits if you can help it.