You don't need to renew your MEP, just ME/IR.
If first time renewal you only need to do it in the sim, saving you much money.
You can have it done within 2-3 days, at least here in the UK, fairly easy, a couple of sim sessions and test.
Just make sure you check with your local CAA what paperwork they require, it can be quit complex, I renewed my Norwegian ME/IR in the UK, and the Norwegian CAA requested a load of paperwork for this.
If first renewal, I would it in the sim, to save you loads of cash, Norway is probably quite expensive.