Finding another position that is just less draining doesn't further your goal to build your own products. If your key goal is to build and sell your own products you have to look for ways to do that and not just the next less draining "job".
You could instead try and move to a consulting role with the company where you can control your hours and do more off-site. Seeing as you said a German auto, that may not be so easy to do. The other option is stay in your day job temporarily while you find a couple of consulting gigs (even PM type work or whatever you can) where you can basically have part time work and you know you'll have money coming through the door, but that will enforce some discipline on your days. Then use the time you have to build out your own products and get it moving. Also, the part time work lets you interact with other professionals and keeps you a little more engaged then you might otherwise get if you just solo out immediately, which is helpful.
My 2 cents, if you have any concerns about whether you can stay disciplined to make it work, don't just jump and start living off savings. Do one step towards being 100% on your own, but do it with some part time work which forces some structure. This will help you transition and let you figure out how you work best, and how to motivate yourself. I have seen this is where a lot of super capable people make their mistake initially. Having a little extra structure at first where you must deliver something for someone every week etc will help you. Also, the income you are taking in is a way to help offset just living off your savings since that can also be a scary thing to do, even if you have many years saved up already. When you only see your account getting smaller it is hard not to panic a little.
You could instead try and move to a consulting role with the company where you can control your hours and do more off-site. Seeing as you said a German auto, that may not be so easy to do. The other option is stay in your day job temporarily while you find a couple of consulting gigs (even PM type work or whatever you can) where you can basically have part time work and you know you'll have money coming through the door, but that will enforce some discipline on your days. Then use the time you have to build out your own products and get it moving. Also, the part time work lets you interact with other professionals and keeps you a little more engaged then you might otherwise get if you just solo out immediately, which is helpful.
My 2 cents, if you have any concerns about whether you can stay disciplined to make it work, don't just jump and start living off savings. Do one step towards being 100% on your own, but do it with some part time work which forces some structure. This will help you transition and let you figure out how you work best, and how to motivate yourself. I have seen this is where a lot of super capable people make their mistake initially. Having a little extra structure at first where you must deliver something for someone every week etc will help you. Also, the income you are taking in is a way to help offset just living off your savings since that can also be a scary thing to do, even if you have many years saved up already. When you only see your account getting smaller it is hard not to panic a little.