The main problem with gas wells is liquid loading but you said that you do not have this problem, How the production curve looks like. If it has a normal decline curve obviously you do not have liquid loading problem, but if there is some anormal decline, you can use a plunger lift is a good and cheaper methods to optimze gas well production. I used this system in oil wells with gas linft intermitent in order to reduce gas lift requirements and paraffin control. I have a paper with case study in gas well. Let me kbow if you need a copy