Don’t get confused with how long the particular visa is valid for and how long the IO will stamp your passport for how long you can stay. The visa just shows you how long you have to enter the country. How long it’s valid for. It is not how long your STAY is.
Regardless of the rate, it’s still affordable. $60 - $70 US a month is way better than the $300 I paid at my home in the US. Closer to $500 in the hottest months. If I’m hot, I turn my aircon, if I’m not, I don’t. Simple as that.