I've developed similar projects in the past, using Python.
My estimated time to complete the task is 12 hours, three work days, less than a week. Total: $360.-
I will deliver:
* the requested tool for downloading your complete Hotmail history, including attachments. Each individual email will appear as a single file in .eml format (a standard format that any email program can handle, including Outlook Express, Thunderbird, Eudora, etc. -- you can even open it with Notepad)
* emails will be grouped by month/year, and the whole package will be zipped if you prefer
* the corresponding setup program for installing / uninstalling the program
* complete source code in Python
* compatible with Windows XP up to Windows 8.1 (the later in "desktop" mode, that is, not an app to be used with the "modern" interface but a program to be run from the desktop)
* of course, complete support for installing and using it