its no different than me teaching someone how to trade for a living, no offense but you make it sound like people in general are cynical in nature

You can get open box, scratch and dent or trade in deals for savings.

Like @Aaron McGinnismentioned, QB Premier is your best bet, it has "Class" separation feature where I use 1 "class" per project, and have "trade" accounts, however, I use my Trade for subcontractors, and unfortunately, all my materials are in one place, it is too time consuming for us to trace per trade PLUS per receipt; but to answer this question, your best bet is to input/import all your receipts on excel, have columns like project #, description, qty, unit, unit price, amount, tax, trade, comment.

By the time the third guy comes you will know the correct way to finish it, the terms and jargon used in that trade and you will appear like you have done this before and you know what you're doing. 

I'm trying to trade up my primary right now and inventory for 3-4bdrm single family homes in decent San Diego neighborhoods is almost nothing.  

Call each trade yourself and get bids.

I have watched people empty pickups even a trailer load Some smaller businesses even do it I know a landlord who tells his guy to swing by an apartment or store to dump the old mattresses and trash or building materials (and He has his own dumpsters but likes to keep them empty ) I said something to him about it.but he thinks its ok.

about 125k to get it done.350 - 125 = 225k  and most folks are going to want to make 15% on gross  so right at 55k HOPEFULLY although now a days you might find someone that would take a swing at this for 25 to 30k but most won't.  225k - 55k  and the flipper will want to pay 170k ish for it...

Finding trade labor is going to get challenging and costs are going to be elevated.

You could try trading with shiny stones and gems but I dont think that practice is still in fad...