Yeah, thats a radio analyst who is offcourse talking out of his ass.
What he is saying is "napoli have 63mil, and spend just over half of that, they got plenty left, they also arent making big depts like lazio roma back around 00's".
What he isnt saying cause he is a dumb sack of cock, is that napoli now lost its big sale guy. Higuain isnt gonna sell later in his career for as much as cavani. thing is, napoli now have to increase wages, and take a risk on the long term, by making a jump.
They are healthy now, but wages run for years, and the major thing is, once they have to replace higuain, they'll got alot less to spend then now.
Basically, to sustain themselves as the number 2 in italy, napoli have to hope higuain is about as succesfull as cavani was, that they have good CL campaigns, and can reach the turnovers that a healthy milan and inter, used to pull.
THAT is going to be the big task
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adding to that. what usually happens is that a team like napoli, takes the riskless path and strenghtens the team, and try to slowly grow. Napoli is taking a big shortcut, and they can only maintain this level of quality, and hope to equal juve's spending, IF they can massively increase their turnover.
Wich imo, is gonna be pretty hard.
All it takes, is milan and inter to get new owners, to restore them in their former glory. 1 cash injection in those teams, and they are pulling their weight again, cause they allready are established, they got that fanbase and worldwide connection.
This is why juve has allways been top in italy, along with milan in europe/italy, and inter comming third.
Roma,lazo,fiorentina, sampdoria, now napoli. the all got their time to shine, but eventually, you cannot live 10 years from that one big signing. you need to make enough turnover to become sustainable
and this is why juventus have such a massive leap over the others.