Every client is looking for value, and by adding additional camera angles, and initially including it as a special introductory offer could help to establish new business relationships.
You can be smart though; you don’t have to give away the store and incur more expense than you feel comfortable with. Those cameras can be unmanned as long as you plan well. And the added coverage will take your interviewee or presenters’ stand ups to another level in post-production.
Remember, to save yourself time when you get to editing, make sure you do a sync clap, slate or lock timecode on set, at minimum, have all camera mics on in addition to your your lavalier mic or mixer feeds.
In the edit, creating multi-cam sequences is as easy as logging all your clips from all camera angles, audio sources like a zoom recorder and, then taking a methodical approach to scenes, subclips and segments. Adobe Premiere does a great job of creating a fully synced sequence, which you can then open up in your timeline to do a live on-the-fly multi-cam edit, while also flexible in tools and techniques to adjust all facets of the video and audio tracks.
As content creators, adding value while working smarter, not harder should be your goal. Offering clients solutions that meet their needs and, being willing to grow with them as their projects increase in complexity, concepts and budgets is all you can ask for.