I didn't realize I had to be that careful with the liner. The water is pretty nasty so I definitely want to drain some out (the vacuuming method sounds good), but I'll leave at least a foot if not more. I think there is about feet in it right now

From the research that I've done I think the sand filter would be a good fit for me. I have a big enough back yard that is far from neighbors so I shouldn't have to worry about the water discharge.

Being a new home owner funds are a little tight for the pump/filter. I'm looking for the best bang for my buck, and lowest initial cost is my thought. I do understand a cheaper filter would have a shorter life cycle and possibly add a little more work but I am okay with that.

Thanks again for the advice and recommendations!