I have gone through and understood your requirements.
We could use Phonegap, jQMobile and develop the app, which will enable you to have the app ready for all platforms(iPad, Android tablets, Windows Phone 8) at one go, thereby catering to larger customer segment. You will be ready for iPad, Android tablets, Windows Phone 8 without having to incur additional cost for developing these separately. These can be pushed to apple stores without any issues and we have done this earlier too.
If you want to discuss further on this, we could have a phone call. If you can give me your contact, I could call you at your convenient date/time and discuss the architecture and its benefits to you and your customers.
Looking forward for a long term engagement with you.