Take your timeCruise the internet for combos you love to see and what it would take to create them. Keep asking questions.
Make sure you get the animals YOU enjoy ! Not just what sells. The market can be fickle and in the end, this is a "passion"The journey should be fun, not just the destination.
3 years is plenty of time, usually. Of course it depends on the animal.
It isn't just about weight, though. You can powerfeed a female and have her up to weight in little more then a year. But weight does not equal maturity. Even if you were to get a female up to weight and gravid in record time, common sense dictates that is not a good idea for any species if you plan to keep them long-term and healthy.
My own personal "minimum" is at least 2 years old and at least 1500 grams for females.
At least 2 years old and at least over 1000 gr for males. Now, males can breed much sooner and at a much lighter weight. I just like to let mine grow up a bit.
Its great that you take your time and are willing to wait until your snakes are ready. Patience can be a virtue when breeding animals and I think you will do just great !!!
Pinstripes are GREAT in combos, I had a few hatchlings and adults. Very good choice. I have no Bananas but like quite a few combos with them
Good luck!