The embassies don't care how much you make, only, if they ask, that you are making money, and paying your taxes on the money you make, if they ask. Basically you can't be a freelancer working for free, if they ask, and they have been asking a lot more lately.
Anonymous participant never forget, on a DTV you are just a tourist, no matter how long you stay in the country. On everything you buy there is tax, and VAT, that pays for all the services you use. Your idealism is commendable, but you are missing a lot of what you actually pay for what you use, at about 17% of what you actually spend daily.
Anonymous participant technically you are doing business, and making money, in Thailand, not remotely, which is a violation of the visa. You should also be paying income tax on the money you make from the Airbnb.
on the data page on the bottom right it says USA. Above that it says authority. List what it says below "authority", usually United States state department.
Anonymous participant just leave and return. You have a five year visa. You only run into problems if you try to extend it inside Thailand. Just border bounce for five years, and you are fine. They only check things if you try to extend it.
for the first time you need a notarized wage statement from the UK embassy, but unfortunately they no longer issues them, so the first year you need the bt400,000 in the bank.
Are you the mother of the children? If not you might need to show you adopted them to have a familial tie to include them under your visa. Your husband won't be a problem. They kids can come in on a simple visa exemption, and stay, as until they are 15 there is no overstay fine for them.
So far you have a pattern of being a tourist. Keep that pattern going by visiting a different country for a week, or two, then returning, and not getting the 30 day extensions. There are lots of countries around, and close to, Thailand that you can do it for years. Lots of tourists base out of Thailand, Bangkok specifically, when visiting other countries in South East Asia. Keep the pattern of a tourist, not someone trying to stay here long term as a tourist.