Building for iOS in 2019 without a Mac?

I’m wondering if anyone has any experience building for iOS without a mac? I have found a couple guides but I’m seeing comments showing people having problems and I’m wondering if the advice is outdated. Has anyone been able to build without a mac? If so, what guide did you follow?

My understanding is you need Unity cloud build and an Apple developer account, but I can’t find any clear definitive answers if that is all you need. I am hesitant to spend the money if it’s not possible to get going without a mac. I have an iPhone SE for testing on.