A lot to read and I am quite tired so instead of responding in detail as I normally would I will just try to restate my position.
1) Buy 3 x 19 year olds right after the draft with good skills and at least allstar potential (probably can do better). Spend a max of $25,000 on each.
2) Buy a level 4 fitness trainer, should be able to get one with less than $20,000 a week salary for less than $25,000.
3) Total initial investment is less than $100,000. We can forget the wages because they will be playing for the team but we will have to pay for the trainer so lets say 4 seasons = 56 x$20,000 - 1,120,000 which is quite a lot.
4) Train for 4 seasons so at age 19, 20, 21 and 22. Always single position where possible. With some 1on1, some JS but remember our target was 12/12/12. Lots of people claim numbers like 14 pops a season or 12 lets stick to a more modest 10 average.
5) Assuming an average of average in all starting skills. 6,6,6,6,6,6.
6) About a season of OD will take it to 12 easily and get say 3 secondary pops say 1 each in JS, HA and DR. 9 total.
About 2/3 of a season of PA will take that to 12 easily leaving time for a couple of pops in JR. Will get another HA and DR. 10 total.
A season of 1on1, this is pop central, should be able to get at least 4 pops in each of JS, HA and DR. 12 total.
The three players are already like this:
11/8/12/11/11/12
and we have another entire season left to cover inuries, foul outs, incompetent training, get one more JS pop, 2 more JR and why not get HA and DR to 12 each as well. 5 total!
7) Surely we can agree this is not amazing training, but very average. 9, 10, 12 and 5 pops is not impressive.
This makes the player sensational in all primaries but for prominent JR and lets go for mediocre in all secondaries. My salary calculator makes him a $34,706 PG.
8) Sell. We has long discussions about this but I still think this player will sell for at least a million, and if he had high potential (a 6'0" 4k superstar with good starting skills drafted from my league sold for $3,000 this season) lets say superstar he could easily be worth $2,000,000. After 4 seasons tax will be close to 0.
f you sell all three you are making about a minimum of $2,000,000 profit at worst up to $5,000,000 at best. More than a million a year extra profit for a division V team. Seems good to me.
9) My opinion. I would never sell all those guys myself. Instead I would keep two and sell one so that I can start again with big men and have better trainees but that final decision doesn't matter. It is the business model I am discussing.
Feel free to point out any flaws I am happy to discuss this at further length and I am still also holding one trump card close to my chest.