Hey my friend. I want to give you a tip. Today and tomorow the last days of the season you have good chances to buy some good players.
I 'm selling many players of my team that are veterans, 5* or 6* , some of them has SA, with the purpose to buy new 5* at the begining of the season. Yes, they will not be 5* the next season for you (if you go in the next lv) but they 'll be 4* which is also good. They were good players for me for this season but I want better and I can buy them. Also I have on my transfer list some young 20-21 y.o. good trainers that I don't have time and sources to develop more. So if your team isn't wealthy, those days are great. Remember that a team with 4* can be great underdog with the right coaching.