|Bluetooth was designed for short distance wireless communication using little power. |
Depending on classification it could go up to 100 meters at maximum 100mW and 0.5 meter at 0.5 mW.
What kind of printers are you going to connect? POS ticket printers??
Any obstruction of the BT signal can cut off communication. Also security can be an issue. If you are looking for a secure setup use wired LAN network.