i have my three all in the same crate..its a large crate tucked in the corner they sleep there and if i leave the house they are put in there and if i cant keep an eye on them or they are getting under foot they go in the crate.
didnt used to be that way
little girl who is 5 was never been the best at being potty trained she'd go out and potty and she's potty in the house and if she was made at me she's pee on my side of the bed. gidget and scrappy who are a year old have always been crate trained and i dont remeber having a problem with potty training them at all.
i felt like i couldnt trust them to be out at night or unsupervised so i decided they all needed to be crate trained..little girl was thrown in to the mix and she of course barked (shes complusive barker) and whinned. so i just got up and left the house for a few hours to get her used to it..they never have accidents in there unless they get sick like direahea. they sleep during the night in there, if they cant be watched are under foot they go in the crate and they are content in there. surprisingly it didnt take little girl long to get used to being in the crate, i remember with in like a week or two i could just say "crate" and they all go running to it. Little girl is usually the first one it it.
all that i have in the crate is bedding..i usually bleach down the bottom every week to keep the "dog" smell gone
When i let them out they always run to the back door to go potty..even little girl..but if she gets mad me she will still pee on my new rug..the brat!..lol
i havent had accidents in the house since i started doing that 8 months ago..they dont get free rein of the house, they arent allowed upstairs because carpet seems to attract them to pee, they are only allowed in the living room, the room with the crate and the office to eat and the kitchen to go outside..
it feels good putting your foot down

..lol but it feels even better not seeing/cleaning/smelling pee pee
good luck