Tool 1: Use a service to make all of your landline services free by using Voip.
Many Voip services may have gone to a paid model but there is a device, known as Ooma that will allow your normal landline phone to run on Voip with only the services of the Ooma box and your router. The box costs about 250 dollars to buy as a 1 time outlay but once your phone number has been ported you will have fee services.
Tool 2: Use a free web based service to do audio and video conferencing.
This may actually be a feature upgrade to the capabilities that you have at present. If you download a program that will give you audio and video conference capabilities, like Brosix and with a simple webcam or headset you can be ready to talking to dozens of people at the same time.