What are the financial requirements for expats in Thailand, and are there alternative options to stay long-term?

hi my question is this, I have ben in thailand for almost 4 years and married to a great lady and we have two sons one hers and one ours, we are building a home and have a new car so you can see we are tired together us and Thailand. now that the USA will not ok what i make from USA the Thailand law states $800,000 or $400,000 in THB in a Thai bank account will keep me here with my family or do you know an other way please help if you can or heard something that can help us please