There's a lot of great answers already about creating an online presence and I definitely agree that content marketing will be very important.

However, if I read this correctly you do specialty designs and installs, so does that mean you are localized in your business where you need to physically meet the customer?

If that's the case, then you need to be sure that you are exploiting the proper networks in your local area. This means joining the right groups, associations, attending industry events, and trying to do demos or speaking engagements. Be a thought leader in your space for your local area.

In the end, just ask yourself - Where does your target market like to hangout online AND offline? Be sure to have a presence in both places.