Hobbyist have tried cheap and it has not worked out very well,
You can get deals , however if you start off in a expensive hobby relying on deals then the hobby is not for you.
It is not like freshwater where you have a far bigger tolerance to water quality.
Many freshwater fish are breed unlike marine where 95% are wild animals so they don’t tolerate bad water quality.
If you want to do it right and have some sort of budget then start off correctly .
You need to allow at least $3000 . Might seems a lot but once you add up all the test kits, salt , etc, etc it keeps going up.
Here is a link that might help.
http://www.fnzas.org.nz/fishroom/basic- ... 23675.html