A single entry tourist visa would allow a 60 day stay that can be extended for 30 days.
When your total stay ends you could then leave and re-enter visa exempt to get a 30 day entry.
Another choice might be a Special Tourist Visa (STV) that allows a 90 day stay that can be extended for 90 days twice.
When your non-o visa is issued stamped in your passport you will get a new 90 day entry that will reset your 90 days for reporting to zero.
Your first 90 day report will be due 90 days from the day you apply for the year extension.
You will need to do your first 90 day report in person or by mail.
1. By air there is no written limit.
2. If you are Malaysian there is no limit by land if entering Thailand at a border crossing with Malaysia. At other crossings it is it 2 per calendar year.
They will accept one done the day before you apply along with a copy of your bank book updated on the day you apply.
Bank letter example: bank letter.pdf
A hospital could assist with getting a extension stay (visa are not extended) for medical treatment.
Most hospitals that have foreigner patients can assist with getting the extension.
What type of visa did enter with or did he enter visa exempt? If he qualifies for another type of extension it would easier to have somebody do it than the medical treatment extension.
You will need a Thailand Pass to enter the country ant it requires you to prove $10,000 of insurance coverage for covid 19. Thirty days of insurance will be enough.
Select land travel here for info about the Thailand Pass application. https://tp.consular.go.th/
Don't forget your re-entry permit if you are on a extension of stay (it is not a visa).
It was working a week ago when I posted it.
I found this page on their website. https://www.lmginsurance.co.th/health-universal-series-visa-o-a
The link I posted is on this page that lists the companies for non-oa visas. https://longstay.tgia.org/companiesoa
That is an error on the e visa site. That is the amount needed for a non-o visa based upon retirement.
Upload a bank statement showing the equivalent of at least 20k baht and am sure it will be accepted.
Showing her ID card for entering the country is using border pass that allows about a 3 days stay.
The marriage being legal might be the hang up for getting a non-o visa and extension. It can be done but may not be that easy. Having the marriage registered at a Amphoe might the hard part.
To apply for the one year extension of stay the husband can be asked to show proof on income. The basic number at many offices is 15k baht of monthly income.
For the non-o visa application the 800k baht only has to be in the bank on the day you apply. And then for 2 months on the day you apply for the one year extension.
The 20k baht number is the minimum standard amount required for any visa application.
Not sure why they do not show the 20k baht number. You show more if you want to.
You need a work permit to work and to apply for one you must be working for a registered company or partnership.
You can get a work permit and work if you are married to a Thai.
If the mother of child is Thai they are legally a Thai from birth.
As far as I know the UK embassy does not register marriages.
It certainly not shown on this page of the embassy website. https://www.gov.uk/guidance/notarial-and-documentary-services-guide-for-thailand