Dave Durant BS! Never needed or have done such a thing in 25 years and still living happily and running my two succesfull companies. Make sure your things are in good order and you can sail through without paying anything under the table. Furthermore, if you read up and stay alert you also don't need an agent or a lawyer for anything. I haven't used a lawyer for nothing here. The only thing that comes in handy is a very good accountant if you're running a business.
Sure you can. And this will be also legal income to support your 800k requirement for your retirement Visa. There's a little twist in the formulation and taxation of your payouts. You should talk to the Samakon office or a decent accountant on how to set this up legally just.
That would be a total overkill as they are entitled to apply together as a married couple and thus reducing the monetary requirement from 1.6mil to 800k. Where is the logic?