^^^ Tim as long as you have health insurance your plan sounds solid . I retired at 60 and started drawing SS at 62.5 . Similar 401k savings with everything paid off . My wife and I are doing just fine . I will say we both have pensions from where we retired from so income stream with SS also is very good .
You can always get a part time job for beer money . Or with your skill sets can easily do side work if you want to . Without knowing our expiration date I am always a fan of getting out as early as you are comfortable with . As my dad used to say you could wake up dead tomorrow
