We'll, when the wonderful site appcoda says "Get a Mac" as the first step in the Pre-requisites, you get the feeling there is no way around it.
However, a service called MacinCloud may be a solution. It was brought to my attention at the beginning of my iOS course.
This site allows you to rent a Mac. It is great if you want to get a feel for OSX and how to use a Mac, and also for starting iOS development.
I tried it out for a month at $20 (which gets you 3 hours daily use).
Working with an online service can be frustrating (especially having to copy my files to Dropbox) but it was definitely worth it in order to understand that, if I am going to be serious about developing iOS applications, I need a Mac.
Bottom line - Get a Mac.