it won't be a problem for the re-entry permit BUT it will be a problem for obtaining a 12 month extension of stay as the 800k baht has to be in your Thai bank account for 2 full calendar months before you apply for that extension of stay. Open the bank account on your 10 day visit and transfer the money leaving enough time to apply for the extension when you return
For you, given how frequently you will return to the UK, I would recommend the Non-OA visa which is a 12 month multiple entry visa. It can only be obtained in your home country and requires insurance, police check etc. You can get almost 2 years out of it by timing a re-entry just before it expires with a new year of insurance and you will need a multiple re-entry permit for the 2nd year. It doesn't require any money in a Thai bank
Alternatively the 90 day Non-O visa followed by a 12 month extension, no insurance or police check required but it does mean you need to put 800k in a Thai bank and isn't quite as flexible as you need to be in Thailand for the extension and will need re-entry permits for both the 90 day visa and the 12 month extension
The DTV is for remote work, owning a business is not in itself enough. To qualify you need to be able to run your business remotely from Thailand. It sounds more like your husband runs the business but not remotely. Maybe you could clarify?
Anonymous participant yes. And bear in mind embassies have been known to ask for copies of every page in a passport or even call people in for interview to ensure they remain in the country they applied in.
So your a contractor rather than an employee by the sounds of it. If you have a tax return show that. If not show you are registered with hmrc and provide a covering letter