Retirement visa x 2

[singa-traz]

GrandPa and GrandMa wish to retire in Thailand, they are French, 55 years old.

Would both of them need to apply for the Retirement Visa (O-A), and comply both of them to the following requirements:

800,000 baht in a Thai bank OR an income of not less than 65,000 baht per month must be presented - OR a combination of balance in the bank and a monthly income.

Meaning: 2x800K in total ...

Their son, currently do not live/work in Thailand, but is in a position to get a Marriage Visa (Thai Wife + 2 Kids).

Any other alternative for them (beside a tourist visa, and the associated visa-run) ?

Thx

[lopburi3]

2.8 In the case that the applicant wishes to have his/her spouse stay together in the Kingdom but his/her spouse is not qualified for the O-A code visa, their marriage certificate shall also be produced as evidence.  (The spouse will be considered for the Visa for Temporary Residents under the 'O' Code).

Believe this says if they have a legal marriage the certificate can be used to obtain a visa for the spouse and thus only one needs to meet the full O-A code.