So background, i work 60 hours a week at a job which requires the minimum amount of the effort so i am able to double dip and work on side projects (Youtube/music management) to double my income and i've been reading TRP for nearly 2 years so i'm fully aware of the general consensus on kicking addictions but...

My job ends in about 5 months so;

Is it better to keep up my addiction of caffeine and nicotine to keep my productivity levels up until i can afford to take 2 weeks off to kick the habit when my job finishes or, suffer the withdrawal symptoms now and risk the consequences of getting in trouble at work and having brain fog etc