Hello,
My name is Adrian.
I own a software development company and I can provide you at least one dedicated full time senior web developer with over 7 years experience to build this app. I propose that we build this, like you mentioned, in HTML5 using phonegap. Like this, you can also have a PC browser version.
I looked over the images you sent and the design is nice and clean. I like it. The only problem is that I do not think they represent the full functionality that you need. So I must ask if you have a more detailed documentation regarding the full functionality of the app.
Please let me know if you are interested and maybe we can schedule a time for a conference to discuss this in more detail?
Best regards,
Adrian,
CEO,
Lead Soft.