J.G.
I also have problems with my sons speech, they are/were with the Bay to Bay ECI program, but that is only till their third b-day. So when my oldest turned 3 I took him to our local school, they evaluated him and started speech, free of charge. Also, when you want him to pronounce something clearly, get him to look at your mouth while you say it and show him how to make the sound. Also if you can get him to drink everything (including pudding, yogurt, or whatever you give him) it will help him build up muscles in his mouth. Anyway, i would call the school and ask to speak to the speech therapist there to see if they offer any help to children that are not enrolled in school. I hope this helps, and good luck.