Use Lifetime Unit as a Mini (no cablecard)

It would be nice if I rather than buy an additional Mini, if I could use an unused Lifetime Premiere, Roamio or even Bolt as a Mini connected to another base unit. Basically just have one cablecard and then have another unit function as a Mini - slaving off the base unit. This can be for lifetime units. Is this possible for Tivo to develop via software? Just curious.

Use Lifetime Unit as a Mini (no cablecard)