Mandar, you could use a tiny bit of html code in a cell and have it retrieve an image and display it.

Your client could use an FTP client (eg filezilla) to replace the photo every day, but always use the same file name and the same size for the replacement.

The piece of code I use is this

<img src="MyFamily02.gif" alt="My Family Xmas 2012">

The image is simply uploaded to the public_html folder on the host (don't forget to copy it to your preview folder if you wish to test this :-).

To the best of my knowledge the only alternative is to have you client purchase and install WX5 V14PRO, then maintain their own website.

Hello Mandar, 

by using the Dynamic Content Object, available for Professional 14, you can allow specific users to change the images in the wished area. The user in question will have to register and log in to your website, then he or she will be able to change and add as many images whenever they want. 

Please find here the link to the guide: http://help.websitex5.com/en/v14/pro/ogg_dinamico.htm

Thank you! Kind regards.