What are the best steps to apply for a DTV visa in Thailand while managing passport issues and training options?

Looking for advice on getting a DTV visa for Thailand

I’ve spent 4 months in Thailand this year. I’m currently traveling in Spain and Portugal, and plan to head back to Thailand in October for 2 months before returning to the US.

Question 1 – When and where to apply:

Should I apply for the DTV visa now while I’m in Europe?

My passport is running out of pages soon. I’ve read (and ChatGPT confirmed) that they can put the visa in my old passport, and I’d just show both the old and new passports when traveling. But I’d rather avoid extra confusion with border agents and keep it all in one passport if possible.

Is this a big deal — should I wait until next year when I have my new passport, or just go ahead and apply now?

I’ve also considered just going with the digital nomad option, but I’m concerned about Thai taxes. Based on what I’ve read, I likely wouldn’t owe anything, but I’d still prefer to avoid being in their tax system altogether.

Question 2 – Muay Thai option:

I qualify for the DTV in a few ways, but I’m most interested in the Muay Thai option since it seems to require less financial disclosure.

My gym has a program, but it’s 37,000 THB per week for only 2 training sessions a week. I currently train 5 privates a week for only 5,000 THB, so that cost makes no sense.

Do I have to stick with one approved gym to qualify, and do I have to stay enrolled in their program for the whole visa? Or can I train independently?

I really do train 5 days a week — I’m not trying to scam the system — but at 37k per week, I might as well just get the Elite Visa.