i think Bitcoin is only profitable if done at large scales. you must get expensive mining equipment and of course it consumes a lot of electricity monthly. Also its usually much more cost effective to buy Bitcoins with this money instead of using it to buy mining equipment.
In my opinion, it is better to buy Bitcoin and trade it in a digital currency world and for the price to go up and then withdraw. You don't need to buy rigs to mine because that is very expensive most specially of you don't have budget for that. So, buying Bitcoin is better and then wait until you have reached the desired income.