Yes , some IO are really skeptical about BACK 2 BACK visa stamps on your passports and question why would u come IN Thailand back to back. My close friend was SENT BACK in November 2018. I did consult
about it. The drama was all about 180 days stay / year on T visa ( which I know is NOT A WRITTEN RULE).Despite he having FUNDS and return tickets , they spoke to his GF on LINE and grilled her with many many tricky questions. He got a new pport and came BACK this month.
There is NO SUCH RULE that DMK grills and Swampy is easy peasy.The IO has the authority to deny on any RANDOM basis. All things which I mentioned in previous comment quacking in a row will see the OP sailing in smoothly.
Gururaj Naik On a plain paper get it written from the family that they will be hosting you and that you have enough money to support youself. Get the Thai id of that person with you and phone number / LINE ID in case immi ppl wana check. Carry a receipt of USD equivalent to 20K. All sorted. No need for notarization or ratifying anything from a lawyer.
Gururaj Naik too much gobbledegook receipe dished by you here. Use a reliable agent , pay a tad extra and u need only passport and 4 photos. And no one wants to know abt yr personal ambitions and conundrums here on FB.