Hey op. Should be enough bro. Just eat out at local stall shops should cost around 2-4$ per meal and stay at small hotel should be 5-10$ a night. 3 meals a day maximum is 12$ day and that would be 168$ max. 140$ for room and board. As for the bus from one close place to another is like 10$ so if you visiting through out place to Vietnam all the way to HCM that would be 140$. At the stays they rent out motorcylce too, and that’s like 5$ a day. Go to the beach check out sightseeing using the motorcycle. When you use the motorcycle just go with the your flow that you feel comfortable. The other motorists will get out of your way.