then you could always be cheeky and if you still have writes to edit the website remove the "nofollow", but as Moz said in there Whiteboard Friday, these are seen as spammy links in the footer - not great SEO tactics.
I guess its a debate about getting footer links and ranking in google in the short term to long term benefits of creating more natural links.
Also they said Sitewide links as not great SEO and a link in the footer is usually site wide - so its 2/5 of the bad SEO steps. My gut feeling would be not to do them in the long term you will probably be peanlised, but in the short term you need to make a living.
If this is part of a larger SEO plan maybe include a few links in certain website footers, but with the long term plan of doing none and work on writing interesting, exciting content people naturally link to, but make sure its not the only way you are getting links to your site as you risk losing all your natural rankings.