Single phase variable frequency drives are commercially available. Building it by an individual is complicated.
Do single Mute swans build nests
anyone can build anything, so yes.
Anyone can build a website.
no
A single person can build an airplane.
an electric motor can be build with over 2000 rpm,by increasing the supply frequency.
no
no i have not
Not sure but it is possible.
Yes.
almost anyone that can get the materials
Data for which an independent variable is time.