Can someone from a rules perspective explain to me what exactly are all the steps in cycling a

?
- I pay 3 mana and put the cycling ability on the stack.
- My opponent gets to respond or even Stifle.
- I pay additional mana and put the Soldier ability on the stack.
- My opponent gets to respond or even Stifle.
- I create the tokens.
- My opponent gets to respond or even Stifle.
- I draw a card.
Is something wrong in this chain? Do I have to pay all the mana at the same time?
Thank you
?
- I pay 3 mana and put the cycling ability on the stack.
- My opponent gets to respond or even Stifle.
- I pay additional mana and put the Soldier ability on the stack.
- My opponent gets to respond or even Stifle.
- I create the tokens.
- My opponent gets to respond or even Stifle.
- I draw a card.
Is something wrong in this chain? Do I have to pay all the mana at the same time?
Thank you