Hehe I can give you an example with the brand I have & love
Itti Bitti
I have 5 All in ones, 5 Snap in Ones & 5 extra Inserts. have a look on the website so you see what I'm talking about.
The All in ones if he wees I just pop in the nappy bucket till washing time. If he pooh's I hope like hell that it's a rolling off one

then I just tip into the toilet & put the nappy in the bucket. If it's not rolling off I usually use toilet paper or the disposable (washed & reused) wipe to wipe off as much as I can.
With the Snap in One. If he's just wee'd I just snap off the insert & put on another one & reuse the outer cover. Poo as above, If it's an iccy pooh then I usually have to put the cover & the inserts in the nappy bucket.
Usually Nappy liners are to prevent nappy rash

or for ease of pooh removal.
I think I go through around 6-8 a day? depending on the day?
Also when I go to wash if we've had no pooh then I just do a normal wash & extra rinse at the end. If we have poohs I do a separate rinse cycle & then do the wash & extra rinse. I have a front loader so can't raise water levels.
Hope that helps a little bit?