F.N.
I bought a couple of used/ like new of each style when I was expecting my first. Then before my 2nd was born I took a class on sewing my own covers and tri-folds. And when my 3rd was born I had my preferences worked out.
Bumkins AIO quick easy great fit, no leaks and I was able to get used for $5 and I got 7 new $10 in last years pattern+ 2 free wet bags and a matching bib. AIO diaper with water proof cover. Wash the whole thing each time.
Making my own covers and AIO very affordable and fun since you get to pick out all the details and customize the fit.
Covers and trifolds: Once cover can normally be used several times before it is soiled and needs to be washed. Trifolds is the insert that folded in thirds that fit inside. Easy to wash since the open up and poop is swished off, they dry quickly.
I typically wash diapers every other night.
For the smaller kids I planned on 6 diapers a day and they get older 5 diapers.
My washing routine- I use dry baby wipes (the ones my older daughter has used for her dolls- or got left open) as liners, dump and flush solids- no liner swish in toilet. In the washer do a pre rinse and then start the wash cycle with an extra rinse. I use 7th generation or Arm and Hammer. I normally will use either Baking soda or Vinagar in the load. Toss in the dryer with drier balls.
My 3 year old has been potty trained for over a year but still uses a diaper at night. My youngest is 20 months and potty training. They say kids in cloth train faster and ealier.