Firebrandsaint,
A few things here.
Sudorank is on the right track and other members have pointed out valid concepts.
The affect this strategy will have on your website is positive however it depends on what your goals are for you to consider it a success.
As far as SEO and how posting on forums relates to inbound links to your site, the benefit there will be marginal. Many links in forum signatures and in posts are automatically no-follow and google tends to give less weight to these kinds of links that are do-follow because spamming on forums is very common and its hard to tell the difference between a legitimate link posted for the sake of being helpful and one posted to manipulate rankings in search. Google mentions this in their link schemes description:
https://support.google.com/webmasters/answer/66356?hl=en
That being said, search engines are looking for abuse and not average volume of link building in this way. For example a handful of links built every day is easy enough to identify as someone who is just active on a forum whereas 20-30 on the same forum every day (along with short posts with no substance) looks spammy.
There are other important considerations though and those are traffic and brand authority. People still click on no-follow links and go to websites and buy things. By posting useful information and by being genuinely helpful, you can build brand authority. These two elements are dependent on one another because without thoughtful interaction, no one will care about your business. Without a link to your site in a signature, its harder for other members of a forum to find out more about you and your business.
One more thing about this is that if you are going to hire someone, ideally they need to be passionate about your niche and at the very least knowledgeable about it. They must also be consistent and good communicators through writing. These things combined can help you build a persona on forums that people will trust and look toward for advice which then translates into more traffic and hopefully more sales for your website.
So the best strategy to drive traffic in this way is to be consistent, be helpful, be knowledgeable and don?t trust your brand to any old business that is willing to spam forums for an hour a day for 5 bucks. I would suggest looking for a freelance writer.
Hope that helps,
Shawn