It doesn't work unless you are both very passive and don't fight, argue, or care too much about kids doing certain things or not.
I truly believe that kids need one home and the other home is where they visit. They need to have space that is theirs. To keep their stuff in. It's their space.When a kid goes from mom's house to dad's house every other day it's confusing and is not good for the kids. It's not good for kiddo to go one week to mom and one week to dad either.
IF you ever want to move away from where dad lives you may have to give him full custody. You'll never have your own life again, even if you remarry and have more kids. You'll constantly have to deal with ex. You'll have to ask him if this child care center is okay with him, if it's not you'll have to find another. Same with each and every choice you need to make.
Plus with joint custody you will not get any support, not child support and probably not spousal.
You can put it in the papers that he has to pay half of everything but if he doesn't pay your are legally obligated to pay for services then get the money from him yourself. It's not the businesses job to chase payments from ex's. For example, when you put kiddo in child care so you can work you'll have to pay by the week, even when kiddo is not there. They do not charge by the day, they pay their staff and have that slot for your child by the week so they charge by the week. You can tell them ex is supposed to pay half but if he doesn't you will be fired or terminated from every facility until you have to quit work since every child care center in the town is owed money by ex.
You have to pay the full bill when he doesn't pay and then you have to take ex to court for the money.
Wouldn't it be better to just have custody and get child support to pay your own bills and not have to worry if he pays for this or that? That's what child support if for, extra's you can't afford on your own. He should not have to pay anything beyond that support payment. If he does? Then he's not a horrible parent.
I think joint custody is horrible for the kiddo. I also think it takes away so much from the mom who typically is not able to earn the higher wages a man can earn.