Here is a link to one of my soil based tanks that can give you some insight
The NPT's soil based natural planted tanks-you don't vacuum them per se-you can lightly vacuum the surface of the substrate but you should have plenty of plants to start and they will use this mulm/debris for food-its important that you don't disturb the soil or plant roots.
Trumpet snail are important with soil based tanks due to their burrowing habit that helps prevent anaerobic soil.
The soil based are as close to a natural ecosystem that can be created in a closed system and everything has a job so-to-speak-Once they are mature they don't need care/water changes like a regular planted tank that uses inert substrate.
Like with any planted tank-the driving force and success will be with/based on the proper color temp lights. Without proper color temp lights and photoperiod the plants can't photosynthesis and without thriving plants they can't help keep the water safe and can be the cause of water quality issues....