White herbs are 500g each on jp server. You shouldnt be worried about this~
Food does not cost much if you take it slow. Feed dungeon loots to keep it filled. Items like ankle-xx boots are excellent for raising stats.
Let's do some math:
100prof weapons are expensive, 100prof gladius goes for around 50k on jp server. I'd think 100prof 2hands costs 100k in NA server.
Assume potion costs 5k due to greedy merchants
So you spend 55k on repairing 30 points on ego gladius. Thats about 2k each point. Keep in mind that dura goes down twice as fast as you can not bless it.
105k to repair 50 points on 2hand. Thats about 2k each point as well.
Conc: be prepared to pay 2x edern repair fees, and feed it dungeon loots.