Remember, Eco-Complete is completely inert. It contains nothing for your plants unless you add it.
Pool Filter Sand and typical aquarium sand (not the sugar/fine stuff) is heavy and rarely messy.
My point is that if you want the look of Eco-Complete, there are much cheaper options. Garden/feed stores in Eastern Kentucky often have crushed black lava rock for super-cheap. You can also pick up Turface and similar products at John Deer and Tractor Supply Co stores. Depending upon where you are in EKY (I'm from the mountains, too), you could potentially get those substrates for much cheaper than anyone else in the state.
For fertilizers, use the SEARCH function here on TPT. Check out the Ferts & Water Params sub-forum. There are also several calculators that will help you determine the specific amounts you'll need.