How many monitor can this run?

Hello Plugable!

Iv been looking for a menu display solution for around 10 hours now with most solutions costing upwards of £400 for 3 TV menu board. I found Plugable’s USB to Hdmi & VGA adapters and so far love the idea of using usb to transmit the video but before i buy the products i have a question.

Ok here it goes i want to run 3 TV’s connected to a laptop using the specification listed below. The only program running will be Microsoft PowerPoint, would this be possible or would it require a better machine to not get lag spikes? The idea is to create a digital Menu board similiar to this
https://fastfoodsignage.co.uk/wp-content/uploads/2017/04/IMG_9354.jpg

Laptop Specs:
Toshiba C50-B-14Z 15.6 inch laptop. Intel Celeron dual core @ 2.16ghz to 2.60ghz x2 cpu, 4gb ram, 500gb hard drive, wifi, bluetooth, USB 3.0 and HDMI output. Windows 10

Thank you for reading.