This whole life is a grind, and as one that did start from scratch more than once, i can tell you that, i feel you for not wanting to be back there, but the same tools you built to get up on the first time, will serve you this time around.
Its easier said then done, but when i had to rebuild myself, i always relayed on some of the positives from my past, let it be relations, skills or insights.
So consider that after what you have now, even if you financially go to square one, your not actually at square one.