Getting visa for US and European countries is difficult and expensive as compared ASEAN countries. If you only want to explore US, UK and Europe then be ready to spend more money for VISA proceedings. But for countries Like Singapore, Malaysia Sri Lanka this cost is reasonable. For Singapore cost is about 3000 INR and getting visa is also not difficult. I am currently in Singapore and I apply visit visa for my wife and kid 2 to 3 times in a year and Pay SGD 30 per person for 30 days visa which is 1500 Rs and process is also completely and very easy. Even I got Malaysia visa for 1 year for SGD 65 which is quite reasonable. for Indonesia there is visa for Indian passport holder and you only need to pay 21 SGD immigration tax which is not much. So as per my experience about ASEAN countries visa norms are good and at reasonable cost.
Thanks @firepower for sharing visa cost about US, UK and Schengen.