you can buy cloud subscriptions to work on the cloud (
http://www.macincloud.com/), I have not tried the service.
The only alternative is to learn a totally different framework.
Like I said, there are many cross platform frameworks that would compile to ARM (iOS, Android) and even desktop.
Of course that means a different language than Objective-C.
It depends on what is your objective and what background you have.
Here is a small list:
- Adobe AIR: Actionscript 3 language compiles to web, ios, Android, Desktop
- Corona SDK: Lua, compiles to iOS and Android
- Marmamalde: C++, compiles to iOS, Android, Windows Phone, Blackberry, Desktop
- Haxe: Language HAXE, compiles to iOS, Android, Web, Desktop
...
There are so many options, note that each option might have a license for Production and some times, the license would be the same as getting a Mac Mini :)