Is a one-month DTV program enough for a Thai visa, or do I need a longer course?

My DTV story

Hi there wanna share my story maybe you can use it, Im from a scandinavian country the whole process took 2 working days no problems. I was in contact with 5-6 Muay Thai gyms almost all of them had 6 months program and even 9 months and you can wonder why :) Only one gym that i find Tiger Eye had 1 month program. I was reading here on the forum that 3 month or even 6 months was mandatory so i grabbed my phone and called the embassy who clearly stated : 1 MONTH IS ENOUGH they fully understand that maybe you want to travel around or you dont like the gym etc.. Next when you upload your financial docs there is only room for 1 file i had mine on several accounts next day email from embassy and you can upload more ... The whole process seem like a financial screening who are you where do you work what is your income etc.. not so much about cooking class or Muay thai and the duration Thats it hope you can use it .