Also, avoid drowning your plant with water and watering it too much and too often.
If you can't afford a humidifier (they are dirt cheap, like 10$ for a 3L Humidifier), at least put some wet towels inside a bowl with water and leave the edges out of the bowl to increase humidity,
You can even cut a plastic water bottle in half, make some holes and spray water from the inside and cover the plant, like a humidity dome: https://goo.gl/n1wnSo
Try lowering your exhaust speed, you need a nice, humid and warm enviroment.
You can buy cheap thermostats that are easy to work with and understand, like this one:
https://goo.gl/GNkNqD
You can do many things with very little money, as long you use your brain!
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