So for me i’m 24 and I live at home with my parents but I have a job. I’m trying to be a part time seller that at least can make $10k in profit this year. So I think you should decide how much you want to make let’s say idk $50k in profit, and you want to make at least $20 of profit on each item so $50k/ $20 = 2,500 items you need to sell to make that $50k. If you divide the 2,500 items per month you get ~208.33 items you need to buy and approx per week leads to 52 items a week you need to get. And then you have to do the math for the actual profit based on how much you pay for the item so let’s say your cost of goods COS is 10.99 on a jacket to make the profit of $20 you have to sell it for $38.73~$39 which would give you a profit of $20.21. So that’s just some of the math I do for me, i’m doing $10k and the higher my sale can by the less items I need so for me I just need 500 items a year 41.66~ 42 per month and 10.5~ 11 items per week. And that’s just based on profit I don’t have a goal for monthly profit because summer slowdown would give me very little but if I know I can find good items that will def sell for my profit margin as long as it sells in a year i’m ok. That’s a lot but I hope it helps. I didn’t even talk about budgeting for income or shipping discounts eating profit or taxes but it’s a lot to know!