RAK and CCFZ have the best reputation when it comes to freezones outside of Dubai or Abu Dhabi, that’s why they are more expensive. They are the best to deal with. Ajman has been trying to compete with price, but their handling of things and speed is not that great. They also require a business plan, something that was not required at CCFZ. I would also rather bank with NBF than Ajman︀ bank...
You can check the packages for CCFZ on the website I gave. Annual trade︁ licence fees will depend on the type of licence you will have but roughly expect︂ to pay AED 20-22,000 on renewal. They seem to mention package with business bank account︃ setup, I would ask them which bank are they partnering with. Residence visa fees are︄ roughly AED 7000 with medical every 3 years.