EBC (Everest base camp) wil cost you around 1- 1.25 lacs.
You can plan your trip on your own ,where your budget will be reduced something around 20k
Bt it's advisable to organise through trip organizers..
Best month for EBC wil be May or June
The cost totally depends on the numbers of day that you wish to take and groups, if you are looking for a cheaper cost then we would recommend you to take an 8 days Everest base camp trek the shortest version, simply type on google for Everest base camp trek where you can see more details in..