Teams Calling Configuration for small hybrid organisation split between countries... how to do this?

We are a startup, UK-based micro-sized business, and we are considering Teams for our telephony and collaboration needs. We'd like to know if Teams can support the configuration described below, and if so, then how this would be configured, in simple terms?

1. We want all inbound calls to our main UK phone number to come into Teams. (Happy to take a new main phone number from Microsoft to get started.)
2. We will have 2 UK based operatives who may work in different physical locations. Each will have at least one device with unlimited mobile carrier data / uncapped WIFI.
3. We will have 2 Philippines based operatives who may work in different physical locations. Each will have at least one device with unlimited mobile carrier data / uncapped WIFI.
4. The 2 UK ops are likely to work concurrently. The Phils ops will never work concurrently - if one is on the other is off.
5. We would like inbound calls (calls to our main UK number) to ring the UK based ops simultaneously (subject to their individual availability status); if no pickup within X seconds (or nobody available) then ring Phils ops (subject to their individual availability status); if no pickup within Y seconds (or nobody available) then route call to a voicemail destination shared by the 2 UK ops.
6. Allow UK ops to use Teams to make domestic outbound calls only. Apply a spend cap to prevent any cost accruals above a predictable, fixed amount.
7. Prevent Phils ops from making outbound calls using Teams. Ensure zero cost accruals on calling by Phils ops.
8. All 4 operators to be able to Teams call each other (internal Teams meetings) without restriction and cost free.
9. For outbound calls, present the main UK phone number as the Caller ID on the receiving end of the call (where supported).

Is this configuration possible?

If so, could anybody briefly outline the required steps for configuring this?

Any potential landmines with this?

Also, any legitimate Teams licensing arrangements to support this scenario which would save money?

Many thanks in advance for any advice which anybody is able to provide.