Given your monthly running, yes you could opt for an EV as you would save on running costs. However there are three important things to consider. 

Personal charging: You should have the option to charge at home or at your place of work. This is the most basic requirement as living fully on public charging is very challenging, given the paucity of free and operational chargers as well as the time required to charge. 

The length of your journey; since you said most of you running in on highways, this is very important. Highway chargers are present but often can be occupied or even not operational, thus if your journeys are upwards of 300 kms, you will need to stop for charge with most EVs. 

The route elevation; besides distance the elevation of the route is important as you can lose a lot of range with steep and long ghats.  

Thus if your highway running is below 300 kms per trip with very few to nil ghat sections, you can safety opt for an EV, else you would be better off with a strong hybrid or even a diesel.