First I'd hire a lawyer and a financial planner.

Then I'd get an unlisted phone number.

Then I'd take care of some personal and family stuff.

I would try to enroll in vet school (if they'd take a 40-something PhD...)

If I became a vet I would have a general practice and also study Feline Oncology.

Failing that I'd buy a parcel of land and have a Best Friends Eastern equivalent. I'd like to specialize in special needs cats (FIV, FLV, etc.)