Rocky,
What is happening is that you are asking questions that insinuate that you are new to BPs, so therefore people are assuming that you are not at the stage where you should be considering breeding.
First comes top notch husbandry (and lots of research)... then come lots more research... then comes a second snake... then lots more research... then breeding.
Tubs are preferred as it is easier for most people to maintain proper husbandry in them. It can be done in tanks, but IMHO that falls into "advanced husbandry". Most people start with tanks, and may succeed, but it is a lot more work.
And it involves are a complete knowledge of husbandry, how to achieve it, and what the limitations are.
As well as concrete knowledge about your snake. Their communication is not verbal. If the snake is thriving in optimal conditions, then that is a SUCCESS!!! Anything short and your work is not close to being done.
That help?
Bruce