You are saying its easy to promote out of IV and V. So if someone promoted while training, did something easy then while training it doesn't prove training works.
To be perfectly clear, I am saying that it is possible to have league success and a training regime in the USA in V and move up into IV with continued success. I am not making a sweeping generalization about every nation's lower league level or saying that it is the only or optimal method even in the USA, just that it is absolutely possible in this specific set of leagues. If the original poster was in Lower Buttmunchistan's I.1, the scenario would be entirely different, and I wouldn't know or pretend to know what his situation was, nor would it really interest me enough to find out.
maybe its easy to promote in any case. My opinion is that those who save enough money/earn enough trading to invest fully in a training process are gonna do waaaay better. In V and IV USA your income is so low its hard to afford a level 6/7 trainer and top notch trainees. Even with a high level trainer if you don't know how to spot quality trainee versus broken trainee its hard to make a profit.
So you don't use a level 6/7 trainer or top notch trainees. You don't need to yet at that level. Heck, you can certainly survive and thrive *AT THOSE LEVELS* with two position training guards with lower potential, for example, *IF* you do it intelligently and build a team intelligently.
The fact is that I HAVE made a profit on my trainees. Nobody has shown me a specific trainee built buy a new IV or V team that spent little money to acquire, can swear they didn'T spend a lot on their trainer, still had good record and the trainee worked out to have value on the transfer list which was greater than their investment. I've had some people talk theory about it, but no examples of an actual player. Maybe there is one and I am proven wrong. I would still offer if its possible, its not PROBABLE. Most people training at your level are in fact wasting their moeny. ONe way to prove that is for you bandwagon guys to get a TPE on all your trainees and fess up how much you paid for them and how much you've been been paying your trainers
I'm not going to ask for TPEs because that's clearly a forum violation, and I can't post them because these guys don't have TPEs listed, but I think it's fair to assume that an 8/7/12/9/8/8 20yo guard likely is worth more than 55.4k, and I am certain that the amount of the trainer's salary allocated to him is likely less than the amount of additional salary of a replacement veteran with that level of OD, since he comes pre-loaded with a whole load of other expensive skills. Heck, even the crappy 5/7/12/8/7/6 guy is probably worth more than the 10k it cost to buy him. I'm not as sure about the 6/8/11/8/6/8 one, though, since he cost almost 160k initially.
Of course, because of the vast expenses of training guys like this (and a draft pick and a potential SF I have paid a lot more for and switched to 1-pos training for), I'm only pulling in roughly a 110k profit per week. I still am at least 8 days away from having an arena with at least 10000 seats, too, and I have actually now lost a league game in IV so clearly it's all doom and gloom for me. ;)