Hi, I have read your requirements. I am customizing blogs for the last 2+ years. For your blog the answer is YES we can edit footer and add/remove widgets. Infact we can remove the default footer credits also and add your own. I can add sidebar widgets also. All these needs editing from Theme customization, HTML customization and Theme layout menus.
I am a Web Designer and Developer with an Experience of 8+ years. Its been an honor for me while working on various types of projects including Adobe Illustrator, Mockup Designing, PSD to HTML, Responsive CSS, Custom WordPress Theme Creation, Migration, Error Solving and Graphic Designing.
I am available right now. We can discuss more on chat.
Thanks n Regards!