Well, you might have a good point, but on the other hand... it's no good for everybody.
Sure, players who go for exp will find your way of making money quite suitable, and working well.

But WLO is way more than just exp. Many of the players stay here not because of good pvp and pvm system, but because of alchemy, manufacture and quests. For such players remoting in kelan cave would be a very short-term income.
One con is it's boring and not giving player much entertainment. If this happens in the beginning of the game it might discourage a player who goes for quests/manufacture.
Second con is fact, that not an exp-player sooner or later HAVE TO get most of the machinery to his tent, otherwise he wont be able to do anything by himselves. So in my opinion for a non-exp player it is much better to start exploring world, get to know the drops, do quests, and start to make his own machinery from his own gathered and compunded materials. ESPECIALLY that there are really few quests that need any money to complete. What I mean: you can go really far in the game not having ANY money on your char (wich I find very good).