I agree with Tokyo.
It’s very dependent on how you play the game. I for example spend even less than what you were expecting to spend. I too play from the start of the server almost, was late 2 weeks but I managed to jump on the main train. I have in the time here only spent around 20 eu to get me going in the start, and then after that I went fully F2P.
But still this doesn’t change the fact that you CAN ans nobody is stopping you from spending however much you wish.
If you wish to play with only few accounts, then you “might” struggle a bit, depends on how much you play. If you wish to do the daily quests and objectives, you can easily play fully F2P, but if you wish to farm all the time with all of your caharacters, then it might change a few things on how you finance them properly and equally.
I would personalky say, go for it!
You can still experience every fact of the game even while spending less. The debate is never ending in the L2 community, but it all comes down to every person specifically.
People spend hundreds, but that doesn’t mean you will be the best. If you know the economy well, and get lucky from time to time, you can achieve the same results as the ones who are spending lots.
Have fun