I would buy my own island, fit it with everything I needed to survive, buy a boat to take me to the island, and when I run out of supplies, I would return to shore and buy them (knowing I had the money to do so)

that, or hire some workers, build the stores I need on the island and fill the shelves (though I'd still need to come back to shore at some stage)

perfect isolation, and I wouldn't have to deal with any (or many,) people. depends how I end up doing it
how long do you think you could cope in isolation?