Last year i book mas to seoul for this coming april rm1.2k per person. Consider cheap for full fare airlines.

Yup, 8k is enough. Me & my gf went to busan & seoul last month for 7 days & 6 nights and we even take mas flight. We stay in airbnb. Foods price is a lil bit pricier, even street food is the same. Clothes, souvenir, transport all are not cheap. Only things cheap are the beauty product. U can get facial mask at rm1 per piece.

There are 4 of us staying in airbnb. 2 nights at busan at rm580 & 4 nights at seoul at rm1700. Advantage is most of them provided free wifi at home & portable wifi which u can use outdoor. Try to find somewhere near to metro cos taxi are expensive.

As for beauty product, there many choices of shop. All of them having sales, giving free items as well. They are very competitive nowadays cos lesser tourist from china. Which is a good news to me. Less crowded.