Making a Simple Business app with Unity. (Would it be bulky?)

Hi, I'm currently working in a 2D animation/gaming company and I've been using Unity (w. 2d Toolkit) for half a year now. So I'm pretty much experienced on making 2d apps with it.

Last day, a friend of mine found me a freelance job for extra cash. And it's just a simple database checking software, getting, setting, searching values and such. So there will be only UI elements (textboxes, tabs and buttons). The software will be primarily for Android tablets (and also for iPad in the future).

So, what I'm asking you guys is, would it be plausible to make this kind of app on Unity? I mean, it is a 3D game engine after all. Should I expect it to be slow and bulky for such a simple app? I'm so got used to this engine, I could do this task easily in a week. I don't want to learn and use some other boring app making tool. Also I'm using C# and all Cross-platform C# using IDE's I found have expensive full version prices and crippling free version limitations.