@Francesco ***********
If you plan to stay for six months on your METV you by one ticket to Thailand and one ticket back to Italy after six months.
Then you got one inbound and one outbound ticket.
Within this six months you buy one ticket out of Thailand as an example to Phnom Penh in Cambodia and one return ticket back from Phnom Penh Cambodia to Thailand.
Then you’ve got two inbound and two outbound tickets. Period!
You know your METV gives you 60 days upon entry which can be extended with additional 30 days, so you’ve got 60 or 90 days for your first stay and your outbound ticket to Cambodia.