I think most people will use the state or city on their 2nd search. Meaning, that their first search is not going to really yield anything they can use, so they will adjust it.
However, I doubt the search is going to be “thermal infrared imaging inspection”. I can say with 99.9% probability those results are pretty worthless.
I would focus more on:
city and state and city/state (full state and abbreviation) then these keywords behind it:
thermal imaging scan
Also use keywords relative to what the technology does. For example lets say you want to target moisture type inspections. Your potential client is probably not going to know that IR can do this. So throw up a page on your site for Infrared moisture inspections (you will probably want to reword that) then optimize (SEO) that page then get the keywords in Adwords for it. Make the page very educational, so the person reading it can figure out that maybe IR is the better way to do what they are trying to do.
Go to the Google Adwords keyword tool and start doing some searches with just the keywords, as your state and city searches will yield almost nothing.
Without giving away the bank I would do a lot of research on who is actually searching for IR services (remember this business generally is not a build it and they will come thing). Who currently knows what IR is and why do they search it? You answer that and you will know what keywords to target.
Why screw with SEO? There is nothing with doing it over a long term, but what is your time worth? Most of these searches are 25 cents a click, or less, via adwords. Either hire out the SEO and use the time to educate future potential clients or just do the SEO in very small amounts of time and once again use the time for education of potential clients and networking.
I cannot stress this enough. If you plan on buying a camera or marketing your IR business on the fact that you own a camera and now people will seek you out, you miswell get that ebay account fired up for a future used camera sale. If you market via education and referral business, you will do extremely well. Not to mention that people seeking out services usually price shop. When you bring the technology and solution to the client you basically have zero competition.