Hi Einna,
I tried to go skimmerless, running a 60 gallon deep sand bed fuge stocked with macro algae and sea grass with a 150 gallon display for the past 10 months. I recently got a skimmer (a Father's day gift). In the past two weeks I've seen declines in hair algae and the best water clarity I've ever had (maybe a coincidence, probably not though). I've also started dosing. Its my understanding that when dosing vodka or vinegar (or any of the organic carbon sources), a skimmer is an important if not necessary component to export the bacteria that bloom and consume the nitrates and phosphates -- you might want to get a few opinions on that. Also, large water changes were not enough for my system and were expensive (between salt and di resin it came to around $0.45 per gallon) -- you might end up paying that future skimmer pump money for salt in short order. Just a couple things to consider and good luck.