A very good ‘cheap’ solution is the Jabra Speak 710. You can link two of them together for larger spaces, but they are very loud.
Jabra Speak 710 MS Wireless Bluetooth Speaker for Softphones and Mobile Phones – Easy Setup, Portable Speaker for Holding Meetings Anywhere with Immersive Sound, MS Optimized https://www.amazon.com/dp/B071CGH8YF/ref=cm_sw_r_cp_api_i_3wwCFbQMZM5E5