The board senses which piece stands on which square and sends that to a computer. There is no camera and no recognition of images - the pieces themselves are part of the system.
The most common miscalculation: budgeting for boards and discovering the rest afterwards.
Prices vary by country and change over time, so what follows is the shape of the budget rather than figures - check current prices with a supplier.
For comparison: the same money buys ordinary boards, pieces and clocks for a field of fifty players - what a club actually needs to buy.
A useful test: if you cannot name who will watch the broadcast and where, the boards are not the purchase you need.
And for the standings themselves an app is simpler than any hardware: results go in from players' phones and the table updates itself - how that works.
The board senses which piece is on which square and sends that to a computer, which works out the moves. There is no camera involved - the pieces themselves carry markers the board reads, so ordinary pieces will not work.
Special pieces, sold separately and costing a significant fraction of the board; cabling or a hub; a computer with software to collect and publish the games; ideally compatible clocks so the broadcast shows times; and somebody who has set the system up before.
Prices vary by country and change, but the order of magnitude is that one board with pieces costs roughly what a decent laptop does. A stage of several boards is a serious purchase - for a one-off event, renting costs a fraction of buying.
For broadcasts to an outside audience, a regular series of events where the cost spreads out, sponsor obligations that require media output, or norm events where an authoritative record matters. For a single club evening they are not.
A demonstration board with a commentator for the final game, or a camera above the board for a stream. Often what spectators want is the standings rather than the moves, and those are simplest to show from an app.
There are no club or arbiter roles in the app: the create button is available to everyone. You can announce a tournament today and run it this weekend.
The bot is constantly improved based on real tournaments. If you need a feature that isn't there yet, message the developers right inside the bot with the /support command. Many features appeared exactly because organizers asked for them, and useful ideas get added quickly.
Equipment - showing the game to an audience, equipment for schools, transporting a set.