I'm in the same boat. I see alot of growth in the Mobile Development field. I was torn between Android and iOS for about a year and finally i picked a side. iOS i'm not much of a MAC fan i personally their computers are highly over priced for no freakn reason. However there's growing demands for iPhone and iPads and I do see the value in Apple's mobile devices.
With a lot of research there's no way around it. You definitely need a MAC or I wouldn't be buying one. I hear alot of stories about PhoneGap you still need Mac to process the code and generate it; Apple is extremely picky about letting apps into their marketplace without careful consideration of how the code is generated. So reading the blog "http://www.kryogenix.org/days/2014/0...hout-mac-os-x/" I wouldn't believe it unless he did it right infront of my eye, or create a full non-stop screen cast of developing the iOS app and deploy it.
There's even applications out there like Xamarin that allow you to code iOS apps in Visual Studio using C# .NET but it still needs a iOS system (MAC) as server to process and generate the code into a suitable iOS app. My employer pays $1000 per developer license to have this done.
So i agree with midyanamics 100% you need the following.
And Apple Developer account.
MacPros seem pretty cheap on eBay just get some old one just for iOS development. I'm gonna treat it like a runt; give it a ****** desk, and monitor lol