[Null-Set]

Extending this metaphor, I would then want to own my two bedroom home, and take a vacation to the rented mansion.

Is there a well trodden way to serve most of your everyday traffic out of your own datacenter, but scale out to cloud infra when traffic peaks?

[Nextgrid]

It's doable but the egress bandwidth charges (which are there to prevent exactly this) from most clouds may negate any savings.