Get your AML on a free loan:
John Fleck
Nacer Barazite
Gael Kakuta
If you get promoted, Sofiane Feghouli is often available for less than 2 million after the first season.
This will free up some money for DC:
Sergiy Kryvtsov - I think he will go to almost any championship team. Very solid (and popular), will be good enough for your first few premiership seasons.
Danny Wilson - not sure if he will come
Dmitriy Verkhovtsev - can be picky as well
Nicolas Otamendi - he does come to some championship teams, give him a try
Mark Muniesa -might be too young if you need him right away but gets extremely good
or try seeing if Ritchie de Laet is available for loan from Man Utd, he's decent and well known but he might already be on loan first season (I've never loaned him)