It is 150MB enough for a Wordpress Blog? - A Small Orange Web Hosting Forums: "Yes, a Tiny plan will certainly support a WordPress Blog.
The size of a stock WordPress install is only 9.5MB. With an average amount of plug-ins and themes, I would say that you can expect about 15MB. ASO offers unlimited storage for MySQL databases, but for the sake of details, plan on your WordPress database being 1MB or less in the first year.
In the unlikely event that exceed the limits of your Tiny plan, you can always submit a support ticket requesting an upgrade."