Okay so from my expirence, you do not have to switch teams, all you have to do is put coach mode on and wait till there is like only 9 seconds left before you save and quit. I get 3150 for my 6-12 min game saves, this is how it works, 12 min quarters= 600 VC 11 min= 550 10 min= 500, it goes down by 50 each save so for me a 6 min quarter game save = 300 and if I got that 5 min quarter game save I would get an extra 250 VC each time. You can only do it every 20-25 minutes, you could play blacktop 1 on 1 in that time, also you want to make a created player with max everything and put him on the 76ers(or any team), and then you choose to play as him in blacktop, then you choose the worst player on that team to face and there you go you have an easy and fast win in black top, if you do what I said you could finish a blacktop game in about 3 minutes, 3 minute games x 8 blacktop games played = 24 minutes, so 8 x 150+10(that extra 10 if you get the win)= 1280 VC, so you could do all the gamesaves and blacktop games about 3 times an hour, 3400+1280= 4680, 4680 x 3= 14040, now that's a lot of VC per 1 hour and 12 mins, again I'm not sure if the max time being able to use the game saves is 20 or 25 min(I used the limit of 24 min in this note).
Sorry for posting a tut on your tut, but somethings you got wrong so I had to tell you, also sorry for my bad spelling I am only typing with one hand(my other one is broken and I didn't feel like fixing my spelling to make it look neat
).