Hi,
I have gone through your web site. The static tab addition is simple since you do not want to update it from the admin panel. For the offer of the month product, I will make a Open Cart Module which your client will then use to update the offer of the month product. I can see it on the web site which you passed as reference, "WOODBURNER OFFER OF THE MONTH" section.
Let me know if you are interested,
Thanks, Waseem here :)