Do I need a Mac to published and host iPhone apps?

I have a team of developers baking that app for me, and they said that they would post it to the App Store for me. But I have to pay $100 per year just to have the developer account. & I don't own a Mac, so do I also need that to maintain my apps? Because I'm not the actual one developing at, will just have the account.

No just go to the apple app store and download the compatible software for your pc.

You need account to publish iOS apps. It doesn't matter who push the app as long as he is using that account.

Well since you aren't actually doing anything aside from paying for the developer account then no you just pay, & they would do what's necessary on the Mac.