Being present online is not going to be any cheaper nor easier than being present offline. It takes even more to be consistently present cross media because regularity and quality count.
The main difference between offline and online media is, however, the responsiveness (you get a faster return on whether you do right or not) and the ROI (you get to measure what counts and how to improve it).
The good news is the more you give and the more you get : by transforming your customers into promoters we will help you in engaging them more and having them advocating for you.