Hi Kalin,
Did you resolve your original issue with the multiple EA tabs? Was it that you were running EA on separate tabs rather than separate browsers as I expected? It’s good to clarify for anyone else who may come on the forum looking for an answer to a similar problem :-)
Setting up a vps is pretty straight forward. It is essentially just a remote computer close to the brokers server which will run your MT4 terminals 24/7 and reduce latency (your order signals will be faster).
It is definitely worthwhile. There are many forex specific vps options (will find on google easily) with free trials. Just sign up for a couple and see what one you like best, it’s more about the cost per resources you want (number of cores, ram and hard drive space) which is dependent on how many MT4 terminals you intend to run. Also when choosing an operating system use windows 2012, it uses less resources and is better for this purpose in my experience.