you do not have to be in your home country to apply, you just have to be out of Thailand, lots of people are applying out of Thailand, but they are not in their home country, but they are applying their home country online, I did mine here in Canada, but I could’ve been anywhere in the world, it would not have mattered
Very easy to apply online, no issue at all, once I changed my category from remote worker to soft power activities, it took 2 days for my DTV and 1 day for my wife's DTV, online saved us a lot of time and effort.
They are all going online only soon, all visas will be E visas from now on, no in person visits to consulates or embassies, this has been quite prominent in the news lately 
That doesn’t seem very fair to me, I was approved at the consulate in Vancouver in two days, I was also rejected the first time, but they didn’t make me pay again
all embassies and consulates are going to E-Visa only, it is a far better system for everyone, I got my electronic DTV Visa from the consulate in Vancouver Canada in 2 days, very simple straight forward process, saves everyone a lot of time and effort
I have been down this road, I am self employed, I did everything I could possibly think of, the Thai consulate even helped me, but in the end I was not successful as a remote worker, so I switched to "soft power activities" and got my DTV Visa easily. They like people to work for a company with a letter that states they are able to work remotely, when you are self employed it does not seem to work, at least for me it did not