Keep hosting and model costs separate.
A clear budget starts with understanding what each service provides.
A hosted agent workspace can involve more than one service relationship. Keep the hosting arrangement, model-provider account, and connected services visible in your setup notes.
Record the boundaries
Write down which provider supplies each part of the workflow and who manages its billing. Confirm what is included before activating a paid configuration.
Assign an owner
Make sure someone can review usage and respond to billing questions for every connected service.
Review after a trial workflow
Compare your initial assumptions with actual usage before adding more channels or recurring tasks.