Go to your local immigration office and ask for their hand out of what will be required. It will depend on the reason you got the Non O (Wife, child, being over 50, etc).
You are not limited to applying for if you’ve never been to Thailand before. Many people have successfully applied with previous entry history to Thailand.
There are a few options for a 5 year visa. You’d need to check the requirements for each at your local Thai embassy or consulate website. Check out DTV, LTR or the Privilege Visa specifications and requirements.
For 800K you’ll probably find a swift transfer is less in fees than Wise. Wise is great for smaller amounts over swift, but for larger amounts it becomes less so.