you are next example showing that ppl not in business dont know anything about it and if they dont like idea they keep talking bullshits! i will show you some more significant numbers than your 4x50k

lets say Pirate has 25.000 investment and if everybody was on monthly interest 15% (and not all are) Pirate has to pay 3.750 peds monthly = 125 ped daily

so now in worst case scenario that he only earns in month enought to cover interest he needs to get that 125 ped profit daily

part of businessplan:

*Pirate buys ores 3% below markup and sells 1% below markup to crafters, that way he needs to buy and sell only 6.250 ped of them daily and whats more important he can sell them immediately avoiding fees and not freezeing money when waiting on auction, if he can make 3% profit that way he has to buy only 4.200 peds, so lets say average is 5.200 ped turnover*
i just revealed you a small part how it all works (in worst scenario), think once more about it before you will write similiar dumb post again, i hope its not too complicated math

regards

PS. believe me that market is not so complicated once you get familiar with it, you just need to know which ores you can sell with desired profit and use math learned in primary school, also if you will go deeper you can also work out some nice tricks about ore business increasing your profit, i was able to easy make more than 125 ped daily having around 5k working capital