DIY Motion Capture with UE4

Me and a friend are martial artists and fight choreographers and we want to create our own private motion capture studio.
We’re planning to go full on with facial capture with great models but for now, we want to create a basic foundation on which we can build upon later in the months.

I would like to ask are there any recommended guides, software and equipment that are purchasable to start off?
We’re aiming to go for the cheapest for now, once we show its potential to investors, we’ll think about upgrading.

Our first goal for this experiment is:
Motion Capture the default UE4 Mannequin within the UE4 world in real time.