Modular Components for Simplified Payment Verification
The Bitcoin node software has been used by both miners and users of the network for over a decade. However, as we scale - the need to separate concerns has become apparent. The Simplified Payment Verification (SPV) model outlined in the Bitcoin Whitepaper explains how we scale for users.
The LiteClient Toolbox is a collection of modular components which enable the construction of SPV services today. Security, speed, scale, and stability are all achieved at low cost by enabling each entity to independently validate their own subset of transactions within the blockchain.
You do not need to run the node software to validate transactions; you only need the block headers, Merkle proofs, and the ability to check the state of UTXOs with miners.
This will dramatically reduce running costs because resource requirements will scale with your business' volume, as opposed to the network volume as a whole.