New to teams: Are multiple outgoing sales lines possible?

Hey everyone! I am the sys admin of my small law firm, and we officially switch to Teams and Microsoft as a phone provider on September 15th. Currently we use 3cx as our PBX and Callcentric as our provider. 

Most everything is already set up, and waiting for the port. I already have a reception and incoming sales queue set up with a main auto attendant, basically cloning what we have now. We are noticing that our main phone line is being marked as spam when we call out, likely due to it being our main line and our sales dept is going gangbusters. It was suggested we buy multiple sales lines and switch the number our salesperson is dialing from every so often. 

What I am wondering is: If we purchase a handful of these numbers, is there an easy way to switch what the outgoing number of our salesperson/sales team/sales queue is showing on outgoing calls and is there a way to have incoming calls from each of those numbers funnel into our incoming sales queue, which is often populated with at least two people? 

For reference, we will no longer be using 3cx after the 15th so everything is under MS's roof. I also asked copilot hoping it would have some insight, but Im not entirely sure if it understood my situation. 

Any help is appreciated.