Boundary at Home

I am planning to set up a boundary at home and I am torn between getting a convertible pet gate or install a hard mounted barrier on every door. The house is a bit messy with my 3 dogs playing all over the house. Which do you guys prefer?

I suggest a fully automated tech-based solution like this. When the first dog sets the example, the other dogs get the message. It's "Invisible Fence"...with teeth.