I haven't looked at the tracker....
I'd guess with 300 ped runs, at 1 run / day Mon -Fri. and about 3 on Saturdays & Sundays you'd cycle about 3K ped in a week. Sometime more sometimes less. You probably want to be able to list for 7 days, without ped-flow issues, minimum, so start with 6K budget. You don't want to be in a rush to sell 'scraps' so add 25% to get 7.5K You don't want to be rushed in selling to a weak market (Like lyst right now) so you'd want to be
able to hold twice your comfortable minimum at least. That'l give
15K as a reasonable base line of inventory + Ped card. How it's split right now I don't know.
Assuming, again, you cycle 3K ped / week, a 10% profit seems kinda high, because you would need an average MU of over 120%, but for someone's who's dedicated to learning the area it's not really unimaginable - so I'll go with it. So 300 PED x weeks you've been cycling at this amount. (or ~15K profit a year.) What you'd do with this I don't know... can't really guess at your PED card.
Of course, some people think this is all nickel and dime stuff, cause you don't use amps...... but it seems like you're profiting in a week more than other online games charge for a months subscription. Not bad for having fun