Before actually getting the licence and a carrying a passengers on board of the plane

I always wanted to fly since I was born but certain life circumstances always got in a way. Now I have a opportunity to fulfill my dream, however first I have to sit down with the "better" half and discuss this. My missus is very, very practical and simple person and when I mention this to her she will probably laugh as if I am joking. Now, I am not implying that she runs my life and that she would say no (which she will) and that will not stop me (which will not). Just wanted lessen the friction or to put in the aviation terms (new to me) "decrease angle of attack" and avoid a (marriage) stall and spin

Some info about me:
- Mid thirties, two kids, good fitness, good day job in IT field.
- Airplane and fan of flying since I was born.
- Skilled in mechanics/electronics and already know a bit on airplanes (Cessna 172s, long story for another topic)
- Goal and mission: to get PPL, be safe and skilled pilot and enjoy taking family and friends to adventure.
- Ultimate goal: To obtain a CPL and ratings to turn a hobby to income generator possibly (i have a bunch of business ideas).

The actual questions:
1. Can you please give me some ideas how explain this to someone who hates flying (airline at least) and get the things rolling?
2. I am planning to do a ground school in one of nearby (Toronto) FTUs and start flying I need a recommendation/opinion in regards to purchasing my own plane (probably mid 70s 172M/N) to train or should I go with FTU rental fleet and accomplish level of precision flying where I will not mess up my own plane?
Thank you
Best wishes and blue skies
Dan