Hello and welcome to TFP!
I'll take a stab at this, and I'm sure there will be more learned souls along later to correct/clarify if needed. First, the filters on the Intex pools are woefully small. We started our pool experience with an 18 foot Intex, and I was forever changing the filters. A sand filter would probably be your best bet as far as relatively low maintenance. There's really no such thing as a saltwater filter - there are saltwater chlorine generators, but no saltwater filters.
Now, having said that about filters, chances are you have something growing in the water which is why the water's not clear, and 99% of the time it's algae that's growing. You really need to either get a decent test kit and let us know what your free chlorine, pH, and TA are for your pool water so the learned souls here can get an idea of your water chemistry and how to correct what's wrong. If it is indeed algae, then you'll need lots of chlorine aka bleach to bring your pool up to shock level and keep it there until the algae is dead. But, first things first, get us your numbers. If a test kit is out of your budget, you can try taking a sample to a pool store and have them do the analysis. They often try to get you to buy their chemicals afterward, so be prepared to thank them for the analysis and then leave.