All I can say is - awesome! At the age of 41 with clear vision and goals - best of luck to you. I would love to be in your position when not having to worry about financial obligations.
I played tennis 18 years ago in high school and recently got back into it at upper 3.5 level and cannot believe how much I had missed the game. Love playing tennis but always a challenge finding a player at similar level, passion, and drive around this area.