I'm really confused as to what you're already done, and what you're trying to accomplish?
For clarity, do you have any flight training logged?
I'm reading that you haven't yet started, but are looking at complex retract to purchase as a trainer for you to get your PPL in, but put into some sort of business entity to try and get a tax advantage, and maybe/probably not try to rent it out, and when you get 500 hours then go out and buy another plane.
If this tracks my feedback below, otherwise ignore:
Do not buy a Mooney to train in.
Do not buy a plane to start your training - start your training first, when you get past solo then start thinking about buying a plane.
Have > 100 hours before you think about buying something fast.
Decision making is a skill that you have to develop when flying. Staying away from unnecessary risk and situations that can kill you is a great place to start.
My $0.02 - take it or leave it.