Develop desktop software that converts Word and OpenDocument files into valid ePubs

The software takes a Word or OpenDocument file. 1) It first strips these files from all things that are not supported by ePub 2 standard but leaves everything in that IS supported. 2) It tries to create a table of content (TOC) based on the headlines 3) User gets shown the result (text + TOC) and acknowledges it or repeats the process with a new file 4) User gets different publication options with rates so he can compare based on price of his eBook (data should be updatable) 5) User choses a publication method 6) Software asks the user for all metadata (cover, price, description etc.) that's required by the chosen publication option (I will provide the details, data should be updatable) 7) Software converts the file to a valid ePub with a working TOC 8) ePub gets validated locally (ePubCheck is available to do that) 9) Software shows / prints a tip sheet for the user: "What to do now" based on the publication option (I will provide PDFs, should be updatable), like "Go there...", "Do this..." Ideally, software should be easy to deploy on Windows and MacOS. Prerequisites: Must save old projects in a separate folder so the process can be repeated. Must be localizable by localization file (I will provide the translation). Must have a nice, clean interface. Must check for updates and get updates from my web server (options, PDF files) I don't care about the programming environment. I might also be interested in an online app with the same functionality, if interested and preferred, you can also quote on that.