since you used a bleach solution just as a safty precaution wipe it out one more time with white vinegar, This will remove any film the bleach may have left behind .
Like Hank said pool sand or play sand are the 2 best choices to help cut cost just be sure it's not too fine or you will have lots of snow storms ,
As for skimmers I just replaced a old worn out skimmer with a reef octopus and I couldn't be happier with it's performance.
As for depth of sand I wouldn't go any more than 3 inch anything more just calls out for trouble.
hydor koralia wave maker/power-head is what I use with avoid any of those cheaper brands as they are junk .
filter is a good investment to look into .
Are you planing on adding in a sump if so I would go with either 30g or 40g , the bigger the better as you can add your skimmer and heater
A lot of the equipment you need you can find on CL
just be sure its not worn out .
best way to know is plug in the equipment to see if it runs , I also suggest you pull out the propellers to see if the shafts are worn out or on there last leg . This is what your looking for on the shaft , if any of them look like this avoid that piece of equipment . they will not only make lots of noise they can also fail .
Looking forward to seeing your set up once it's up and running ,