Hello Alex, a few members have asked this. We have no plans to develop for PC at the moment. We do not have enough resources or time to develop for other platforms. We have also suspended work on Android for now (UPDATE: android development now continuing)
What might be a little cheaper than a Macbook is to use it on iPad.
Here are a couple of threads if you are interested:
http://irealb.com/forums/showthread.php?t=1011
http://irealb.com/forums/showthread.php?t=1124
and there are more if you search.
If you have no objection to using Apple hardware, this is our main platform and it is unlikely to change in the near future.
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