for ease and comfort or a nano reef, I would just pay the $6 for a 5 gal of SW. You will never use a whole bucket of salt, and will have wasted your money the first time it gets wet and turns to concrete. I use Reef Crystals. it comes in a box with 4 50 gallon bags in it. Ask one of your reef buddies to sell you a bag, and you will be set for life. really, if you do a one gallon PWC every other week, one bag will last 2 years if it doesn't get wet. Is it humid on the east coast? because it sure is here.
Do you really want to spend more on your filter than you did on your aquarium? there does come a point where you just have to weigh the cost/benefit ratio. 30 cents gets you a gallon of filtered water at the grocery store. You can find "zero water" pitchers for $30 at Comp USA. Pour the filtered RO water through the pitcher filter, and bam 0ppm top off water. But wait! it even comes with a TDS meter (A ten dollar value!) lol
If Palm Bay was near Tampa, I'd hook you up.
And buckets are very cheap at Home Deepo