Windows SDK for iPad Development

I am looking forward to start developing iPad applications on my Windows machine but I have hardly had any luck succeeding in it. I even went through the plenty of iPad related forums and came down to this list of two such SDKs:
- Dragon Fire SDK
- RhoHub
However, I am still not sure which one to go with. Can anyone please suggest?
PS: Please do not reply saying why not buy a Mac as that is not in my budget for now.
Hoping to get some good experienced based responses from the experts.
