would like to order all parts so that i don't have to wait for it later.
Same problem, completely unreasonable requirement.
You will end up ordering the wrong parts, and have to buy new ones, wasting both time and money.
No one here has any idea about your construction skills, and cannot advise you on how well the mechanism you eventually cobble together will work. Therefore, it is impossible at this point to estimate power requirements.
But it is possible to point out the well understood fact that steppers are far more inefficient and power hungry than brushed DC motors.
Don't be discouraged, we see this all the time on the forum. Beginners very often put the cart before the horse and start by ordering parts, before they know what the project actually requires.