I need help deciding on a career choice between cota and pta?

certified occupational therapy istant (cota) and physical therapy istant or tech. I am trying to make a career change. I looked up employment adds for cota and the starting wage for a occupational istant is $28-$40 an hour. this is full time work for an liscensed cota with an ociates degree. other programs technical or istant ociate degree program don't pay nearly as much. medical assistant, respiratory therapy,medical laboratory tech and physical therapy pays between $12.00-$14.00 per hour. at least this is what I found doing job searches. I make $12-14 per hour as a home health aide with no prior training. I was hoping someone who is working as a physical therapist assistant or aide and/or an COTA could tell me if my job searches were accurate? and why the difference in pay? I was told there is no bachelor degree program with cota on associate and masters. that is fine as I already have my bachelors and an associate in medical lab technology.