u don't need to show 500k balance at immigration, coz dtv visa look like long term tourist visa. Everytime u enter to thailand u must have 20k THB in hand and u can easily pass immigration. I entered over 10 times and nothing problem
I lived in Bangkok and i visited to Chiang Mai Last week, at first i go there about 2 days and then i have a plan to make 90 days report .. But i can't come back on time and so i decided to out from thailand and come back again. i will show u my visa when i come back
they didn't fine and it's not be a problem coz 90 days report means they want to know where u stayed during these day and if something happen they can easily find u.
I stayed 97 days and today i leave without reporting 90 days report, in rule u can apply 90 days report , before 14 days and after 7 days. Otherwise they will fine you 2000 Baht