TheTraveler
Line Up and Wait
Textron is a public company. You can look at their financials to see what margins they get on aircraft production. Cirrus makes hundreds of planes per year. If margins were all that great they likely could have avoided needing Chinese cash to avoid bankruptcy trying to bring the SF50 to market. Also, the leader in SLSA was Flight Design in Germany. Despite selling the most new SLSA (non certified and non TSOd avionics) at an average price of over $150k they went bankrupt too.
The boneyard of bankruptcies is full of aircraft manufacturers.
Even with 200% margins, a company can go out quickly, especially when they are public. Too easy to get loose with what you are spending your "HUGE MARGINS!" on. While there may be a lot of oversight, there are a lot more hands in the pot. You just need to paper-fudge your way to justification.