Carbon Cristal,
Forgetting the aviation specific questions that might arise from yours, an important question to ask is how are you going to get a stable customer base bringing you repeat business, and how much were you planning to spend doing so ?
Customers don't just arrive on your doorstep, and good
PR & Marketing costs money.
As others have already hinted. Sit down, think about it and write a business plan. Then have it reviewed by someone with a hard nose who is guaranteed to try to pick holes in it .... until you've got to the point when you've covered the gaping holes in your plan, you're just going to be throwing money down the drain.
I'm not saying don't do it, I'm just saying don't spend any money on anything until you've at least made a basic plan.