Where are you getting that impression from ?

Check local Immigration website

First of all, most DTV requirements are embassy specific, so your questions can not be answered until you decide which Embassy to apply at.

Do not change to the inferior DTV tourist visa, from a real long term visa, f.ex. if you have a Thai Bankaccount now, you may be forced to close it on DTV.

Use search to see the Embassy specific requirements.

Read the Embassy website.

Use search to see posts regarding that specific Embassy.

Depends on ( as most DTV ) which embassy you choose to apply at.

Some have income requirements, some don’t

Answers about DTV requirements are useless unless mentioning which Embassy

Start doing your research over,

To study Thai Language you need at ED-visa.

DTV is not eligible for language study.

Stay on your retirement visa, it is a much better visa, and if you want to have a Thai bankaccount, you can’t have that on DTV, and the Thai Banks are closing bankaccounts that are obtained on other visatypes, but now has changed to DTV.

Use the search to find the answers you need.

YES yes.

It's the landlords / hotels obligation to do it EVERY time you changes where you stay.

When you check in ask for a copy, much easier to get then, than 80 some days later

Lot’s of people do, as you can see in all the posts in the group.

And if you can’t meet the requirements, then DTV is not for you.

You can’t always get what you want