not sure of your source. Been told after 3 months need Thai license. Don't want to argue the legality roadside with a Thai officer. In any event, this doesn't affect whether a 5 year license would matter. Temporary 2 year should be fine for most.
because In Thailand, while an IDP is technically valid for one year, its validity for driving within Thailand is limited to 90 days from the date of each entry. So for staying longer it's recommended to obtain a Thai license.
could you expand on how DTV may make you a target for crooked immigration officers? I've arrived twice now with it and there was absolutely no problem or even discussion, just a stamp in and khap Khun khrap
DTV will get you 5 years. Financial requirement of 500k baht in any bank account. Won't be locked up. If work online do workcation. Otherwise do soft power route.
Can only apply for it outside of Thailand. The Thai embassies in HCMC and Hanoi process quickly and lower requirements length of bank statement to provide. I'm not familiar with Laos embassy.
Assuming this is for DTV because of the 500k amount.
What embassy? No need to explain unless they ask. The requirement is just that you have it. Some embassies don't even require 3 months; some are fine with just having it there at the time of application.
can if non-Thai clients and non-Thai business. You're allowed to maintain your business while being a tourist. Really depends on the nature of the work. Still probably best not to draw attention to yourself as this is not officially permitted. Bit of a grey area.