1. Cheapest way to travel from Thailand to Cambodia
Train from central Bangkok train station Hua Lamphong to Aranyaprathet, this train journey is roughly 5/6 hours and costs around $1 or 40 Baht. This is bar far the cheapest way I've found to get to Cambodia from Thailand. The train will take you directly to the boarder where you can go and get a visa on arrival. This boarder crossing has a lot of scams to be aware of, however. There will be lovely ladies selling prepared rich dishes and pre-cut mangos for a very low cost walking throughout the journey, so don't worry if you forget to pack snacks or water.