Just got a new website built and need SEO help - where do I start??

Hi. I own a new paintless dent repair (like a bodyshop repair facility) and we travel from storm to storm in different states. We got a new website built for $650 but it comes with no SEO. The website builder had a friend to refer for the SEO but I didn't feel comfortable with him or his prices. We want to get our website "SEO friendly" and figure out how to do this without getting hammered for ridiculous prices or some sort of contract to pay every month if not necessary.

Here is my website: Dent Teks - Home

Secondly, what is the best SEO method for us to get all the benefits of SEO and top page ranking everytime we set up in a new state or storm since we are a traveling mobile business? Our business heavily relies on "review" based websites like Yelp or Google reviews etc. Also, obviously, top page ranking as well.

Also, any other advice to stem more traffic or business that would be great. We have used google adwords but they are pretty pricey. Yelp has called us about advertising services but haven't tried them yet.

Any help would be appreciated!