I am not saying you ditch them, you can still support your parents from working away. And even if you are planning for temporary marriage, don't you think you will have to move to your "husband's" house once you get married? Your parents are definitely expecting that right? So they are ok with you moving out!

Don't you think marrying someone and deciding to go separate ways could also hurt your parents if you care so much about them? And what guarantee is there that after a while they won't pressure you again after your first marriage is broken?

You need a better permanent excuse! Maybe say you have some medical condition and don't want to ruin anyone else's life!