I have for years used a dedicated host solution to host my different test, demo and whatnot sites.
And at first I was a little reserved about InstaWP.
But the features it offers and how easy it is to setup a site using your own predefined templates.
Now they also offer fake post/pages etc. so that when you spin up a new site it is preinstalled with the amount of fake posts/pages you decide.
The speed of all operations a great.
Its very Easy to setup and to use.

A nice to have tool at reasonable price.