tl/dr : You mass-cook EoL, Beer, Steamed bird. - you get CP from turn ins at the cost of some silver profit, which totals in overall PROFIT if I may say. Oh, and milk.

Good of you have time to spare afk ( 500 repeats might take 2-3 hours) , better if you have the means to cook very fast (+3- +4 cook clothes, p2w cook Pearl shop costume, teff bread,alchemy stone, etc etc)

May not be bad, but it certainly isn't good.

Not bad, Thanks!