John, please heed my words.
At the outset, I always ask my clients for their contact information and include texting capabilities. If they resond “yes”, I make sure they are comfortable being contacted that way (many people don’t have unlimited texting) and then only use it as a means to respond to texts I receive from them, normally announcing tardiness.
Once you make a personal contact (I speak from experience here) with it, you open a can of barrier worms. Rarely did anyone have a problem with me contacting them but, my inbox EXPLODED!!! Some got the impression that my text inbox was their personal blog posting site, and were giving me every little update (sometime I got over 200 texts a day) and querry they could. I have since found that a phone call is not only more personable but, re-initiated those boudaries I had lost.
Please don’t make the mistake I did. Make phone calls and leave voicemails, send e-mails, and open a Facebook account to communicate with clientele. Texting WILL be a nightmare! I promise.