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Minimum viable is simpler than the vocabulary makes it sound. You rent a DID, which is just a phone number in a specific country. You point it at either a softphone on your laptops or your existing phone system over SIP. Calls to that number then ring your team wherever they are. That is the whole thing. Toll free is a different product for inbound customer service and you probably do not need it yet. I set ours up through HotTelecom https://hottelecom.biz/virtual-number-of-azerbaijan.html , using a softphone on each machine, took an afternoon. Tip: write down who answers when and in what order, because forwarding rules are where small teams reliably confuse themselves.