This might be a great idea for a few days but trying to do 15 hour days for 3 weeks is too much. Do weekend sprints where you can tell friends and family that

This might be a great idea for a few days but trying to do 15 hour days for 3 weeks is too much. Do weekend sprints where you can tell friends and family that you're going away / working on something but you can return to a normal existence afterwards. Maybe rent a hotel suite instead of paying to go to HK.