Hey, Otzon I might have what you're looking for. Right now, I'm offering a full WordPress installation, configuration and SEO services (~100 plugins configuration included) for $75. In addition to these services, also included are my 2 perfected, widgetizable, customizable, Adsense-optimized and SEOed themes. (View the source code to see how this theme is SEOed: appropriate placement/usage of <h> tags, main content before sidebars, etc) .
Anyway, you can check out various versions of these "very flexible & configuratable" themes at:
[URL Deleted]
Be sure to log-in to the backend, click “Presentation => Tigerize-It” to see the many flexible configurations of these themes.
Also, remember to “view” the site once logged-in to see the power of these themes with the 100+ plugins installed: you can edit posts and comments right on the front end =P. (Users can also edit their comments without logging in).
There are too many functions/features to list them here, so use the following info to log-in and see them for yourself:
[URL Deleted]
Anyway, if you have any question, please send an email to WordPressSupport (at) gmail.com OR WordPressSupport (at) WorldWiseWebDesign.com (since I might need to do extra work if you don’t use these themes, which have most of these plugins functions already integrated

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Also, I don’t understand the updating the content requirement, just because if you have like 100 posts that needed updating, my rate will go up dramatically. *Note: what I offer solves most of what you needed (without the updating the content part

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Anyway, contact me if via those email if you want a quote on other services.
--WordPressService.com--