C.B.
If you're potty training and just need them for nighttime, I don't get the cost.
If it's just nighttime, I would buy two dozen diapers, some rubber pants and some diaper pins. You can use just a five gallon bucket for a diaper pail - just put some lysol in the pail with water and you have a diaper pail.
For laundry, dump the entire pail, water and all, into the washer and spin and then wash as usual.
I ALWAYS used cloth diapers - cheaper, better for the environment, better for the child.