I've been in Thailand since April with the following:
2 months = Tourist visa
15 days = border hop (day 1 is today)

Future:
I'm staying 6 more weeks before going home to Europe for a month.

 

My plan:
Another border hop, plus 30-day stamp at DMK after a 5-day trip to Hanoi. Is it doable or risky?

 

My history:
2018: 2 visa exemptions at DMK
2017, 2016, 2015: 1 visa exemption each year at DMK

 

I had tried to extend my visa at Nonthaburi immigration but there was a form which had to be completed and signed by my landlord, who didn't want to do so, and therefore I couldn't apply for the extension.

 

Thanks in advance

 

2 minutes ago, underthesky said:

had tried to extend my visa at Nonthaburi immigration but there was a form which had to be completed and signed by my landlord, who didn't want to do so, and therefore I couldn't apply for the extension.

TM30 or what?

Never heard of anything else.

 

 

Just book a night in a real hotel and u are tm30 registered before you go there...Hotels have to report you... Normal thais won't as they love to dodge taxes 

35 minutes ago, underthesky said:

15 days = border hop (day 1 is today)

Why only 15 days?

 

36 minutes ago, underthesky said:

Another border hop, plus 30-day stamp at DMK after a 5-day trip to Hanoi. Is it doable or risky?

Probably, but no one can give you a definitive answer. You are better off re-entering using a visa to reduce any risk of denial.