according to a video I watched the process takes 3-6 months. The THai Residents Permit can take up to 18 months, is a lot costlier and a lot more difficult than citizenship for which you need a minimum of 3 years unbroken stay, stable employment, £ years tax etc and costs 5000 thb pluse expenses. You need to score 50 point from 100
proof of monthly income? As far as I'm aware, a website is NOT proof of work, clients etc. You need a list of actual clients, lesson plans, schedules and income, etc.