Welcome, digital guy.
Congratulations on your business success and LBYM lifestyle. Early retirement looks good on the surface--have you tried running your portfolio through FIREcalc? You might spend a few months tracking your expenses carefully--I've found that my guesses tend to underestimate things bought occasionally like gifts, entertainment, and home and landscaping expenses such as termite bond, new plants, soil amendments, and so forth.
Is your business "portable"--could you move to a lower cost of living state and continue business activities? Many businesses these days are run over the phone, fax, and email, and ship products/services via the internet or FedEx. That would give you flexibility in lowering expenses. Or perhaps you like the autumn leaves and icy roads of the northeast
We certainly find it cheaper to live in SC than we did in CA or MA. One of my brothers moved his business from NJ to SC, which enabled him to double his annual retirement savings. (Now if I could only convince him to invest a little less aggressively! :
Since you've been buying individual health insurance (I presume), the sticker shock is already part of your budget. Remember that insurance will no longer be tax deductible after full retirement (hopefully that will be remedied in the future!). If you and spouse are in excellent health, you could consider using one of the high-deductible plans or one of the very new plans that sends patients offshore for pre-planned expensive procedures.