I'm sorry you were not happy with my answer but the way this site works, you do not pay unless you chose to accept the answer, which you have not. Therefore you have not paid any money for my answer. This site is also not intended to be used as a substitute for taking full legal advice. Were I taking instructions from you in my office, I would need a lot more information than you have provided in order to advise you fully. Many people use this site simply as a starting point of what to do rather than a complete alternative to legal advice.
Legal aid is available for this type of work, I regularly used to grant funding under the legal help scheme to prepare family visit visas. Legal aid for this level of work will be income assessed and so if you have been refused legal aid, it is probably because your friend's earnings are too high. It is based upon your last month's earnings and so if this varies from month to month, it may be worth him going again and being re-assessed should be not be able to afford to pay someone privately.
You said in your initial post that 'Many attempts have been made to acquire 5 multiple year tourist visa for, his wife only, to visit UK for periods of 1 month or up to 2 months. Always denied.' I took this to mean that the visa applications had been refused. I'm sorry if this was not what you meant.
If your friend has never received a decision then he needs to chase up the Embassy and if necessary lodge a formal complaint with the entry clearance manager. In my experience they are a lot more helpful than entry clearance officers. The contact complaints information for the Cuban Embassy [email protected]
Applications can take weeks or sometimes months to be decided but shouldn't take years. If you have proof that your application was lodged then send this along with your complaint to the Embassy. Once you elevate your concerns to formal complaints, they are usually dealt with fairly quickly. You need to know what has happened with these applications before you can start considering next steps.