About One-person full process

Hi !
I’ve been reading those Guides but some outdated, but cool for getting a general idea about encounter life cycle.
My question : A physician could make all the process including billing and getting paid ?

I have an physician friend who visit long distance aislated places to attend general health problems, so he wants to use to record entire process, including payment.

I guess calendar would be not necessary, just search created patient record and add new encounter, fill up clinical forms, and then ???

I assume billing process must be perform by him, but I have no more info about getting paid , generate receipt, and close encounter

Any advice?

After creating encounter they can use popup menu to record payment against that encounter.