My argument isn't regarding net spend. As I've already said Pochettino has been able to get rid of around £120m of mid table deadwood and has done a great job reinvesting that and more in a much better first XI.
My post highlighted however that the ability to raise funds from squad players is starting to dwindle. You now have a relatively small squad and are very light in terms of attacking depth.
To fund further strengthening Pochettino now either gets rid of squad players he himself has brought in, taking a loss on them in the process (Janssen, N'koudo, N'Jie, Sissoko) and hoping their replacements are better; thins the squad further which would be incredibly risky; or a combination of the two.
As I said he will firstly probably get rid of Bentaleb, Fazio, N'Jie & Carroll which may fund one good attacking signing. Possibly Levy will release another £25m and Pochettino will work his magic and I'll be completely wrong.
However again it'll be interesting to see what now happens as all the overrated (mostly English) "talent" that Poch sold at inflated prices are gone. He has been able to afford £80m in signings like Sissoko, Janssen, N'Jie, N'koudo and Fazio who aren't really contributing.
The pressure now for Pochettino to get almost every transfer perfect is telling.