I would look carefully at how much of your current high spending level is connected to not having time to research/follow through with more economical choices and how having more time and shifting around your spending patterns so that you do more stuff yourself and plan ahead more may alter the cash outflow while still allowing you to enjoy things that are important to you.
So, for example, you appreciate good food -- in your current lifestyle that means you eat out, probably more than most people and maybe at fairly pricey restaurants. What about using some of your time off to really learn to cook well? The $100-200 you might spend on a nice dinner out with your wife could buy you a lot of really great gourmet food and cooking supplies. Once you have the time and the skillset, you may find that you enjoy making food for your family even more than paying someone else to do it for you.
Similarly with travel, look at ways to plan and execute your travel plans that bring down the cost while still getting you the same level of enjoyment. This doesn't necessarily mean dropping staying at luxury hotels, etc, if that is really important to you (I know not everyone wants to be a backpacker staying in hostels). But with more time to plan and research, I bet you can bring your travel costs way down, too. Try doing house swaps rather than staying at hotels. Or travel during the shoulder or off seasons when prices are lower -- since you won't have a business to worry about, you will be more free to travel when others are not.
If you are currently outsourcing childcare, that would be another place where you could probably save a lot.
I think if you really apply yourself during that 6-12 month period and figure out how to best invest your time to bring down your household spending, you may just find that you are able to retain most of the things you currently enjoy in your high-income lifestyle, though perhaps in modified form, while bringing our out of pocket costs waaaaaay down.
Remember, the less you have to draw from your investments in the form of capital gains, etc. the lower your taxes are going to be. So bringing down your cash outgo is really a win-win situation.
Congrats on the upcoming sale of your business. That will give you a lot of freedom to figure out what is really important to you.