Keep in mind that sand can be a dangerous substrate to work with.
1). It packs so tightly as to prevent much circulation. If crud gets mixed into it you are not going to be able to remove it.
2). It can be sharp and wear down the barbels and skin of small delicate catfishes and other bottom dwellers.
3). When siphon cleaning it has a tendency to quickly end up in your 5g bucket.
4). Sand can wreak havoc on pumps and motors.
I set up a 20g tank awhile back to be used as a planted tank. It took a very long time for everything to cycle together. I'd say after about 1 year the plants finally took off. I could not believe the places I'd find the sand. I had an Eheim canister filter and the intake was 4" above the sand yet it would constantly find it's way into the filter. I did not want to disturb the sand bed, and it's difficult to do so when full of plants so I did lots and lots of water changes on that tank.
If I was you I'd check around at your local landscaping supply house. Our LFS are kind enough to stock a local blasting sand. It is very large particle quartz that has been dulled after repeated blasting. When the sandblaster says it's no good they bag it and sell it to us for about 10 cents a pound. I noticed it at the landscape supply house as well.