On my save, I regrettably (I'm a Liverpool fan so it was hard to do) offloaded Suarez (48M) and Lucas (40M) to Bayern and Manchester City respectively.
Whilst Suarez is an incredible player, I still think 48 million is a lot of money when you can replace him with a youngster sometime in the future. Lucas, Again an insane player but I can't reject 40 million for him.
So that's 88 million generated from two players, Whilst only 13 million up front for Suarez may seem not enough, It actually helps you in many ways considering the large chunks of cash every month coming from that sale may help you massively in the long run. I think I got like 30 odd million of Lucas's sale up front, So that gave me some cash to spend.
I also offloaded Skrtel (8.5M) to Sevilla, High wages, And there's much younger, More talented centre-backs you can bring in.
Are you planning to just purchase British players? I tried to do this with one of my Liverpool saves, Honestly it didn't go too well. Most of the English youngsters get left behind by foreign talent when it comes to potential ability.
SPOILER ALERT: Jonathan Silva (Argentinian Left back) Has a higher potential ability than Shaw and will only cost around 3-4M Where-as Shaw would cost considerably more.
So if you do want to focus on British talent then make sure you're prepared to pay a premium.
So for Shaw I think I saw someone say they got him for like 18M in the first window, Ince will only cost around 3-4M (You'll get close to maybe more than 1M back, Due to his sell on clause) And Will Hughes, Derby usually demand around 10-11 million at the start, But I've seen someone say they got him for like 7M first window.
Also some other British youth to look at would be
GK - Jack Butland
RB - Callum Chambers, Elliot Hewitt
CB - Harry Maguire, I heard Michael Keane becomes solid. (Andre Wisdom played pretty much every game for me in my first season, Completely outperformed Agger)
LB - Luke Shaw, Ben Davies
DM - You already have Jordan Rossiter in your U18's, Sign him up on a contract ASAP. He becomes a very versatile player
CM - Ward-Prowse, Nick Powell, George Thorne. Could also check out Chalobah
Wings - You have Sterling, Already mentioned Tom Ince. As someone suggested, Townsend could be a great IF although when I tried to buy him he demanded like 65k+ wages in the first season.
AM - Ravel Morrison (Absolute tank, His aggressiveness and lack of sense let him down though, Won't want to be tutored by anyone, Excessive moaning etc etc. So be warned, But he turns into an absolute monster)
ST - Adam Campbell (Beast), You have Jerome Sinclair in U18's who becomes great.
Also, Ross Barkley becomes a great attacking midfielder but good luck trying to get him off Everton, Cause I couldn't.
Hope I helped.