Not such a bad idea to get Ronaldo, maybe a bad idea to be ready to fully depend on him with his injury problems. A good dependable striker like Toni is a better option, then you can sort of flirt with strikers like Ronaldo who may or may not be able to do what we know they showed they can do in the past. So, you'd have gilardino, ronaldo, inzaghi and pato on the bench with all of them managing to get in like 25 games instead of playing the whole season, champions league and copa italia inclusive.
For instance, Pato is injured, Ronaldo is injured, Gilardino is suspended, Inzaghi is injured and Toni is starting at Bayern Munich whereas, you could've had these strikers fit and ready if Toni was the main striker. Give Ronaldo like 30 mins in league and Champions league, Gilardino 30 mins with starts in Copa Italia games, Inzaghi can start in the Copa italia, occasional league and start regularly alongside Toni, while Pato can play 20 league games and a few substitute appearances in Champions League. This would protect Pato being a first timer in Italy, Ronaldo as injury prone, Gilardino as inefficient ~ hence make him gain confidence and look good with 10 - 15 goals as a non-regular, Inzaghi the usual destroyer in Europe and what we can expect 25 - 30 goals in Serie A by Luca Toni.
I used Luca Toni as an example of a striker who can be used who is world class and still fit enough to play a whole season, but similar calibre strikers like Drogba, Amauri etc would probably fit the bill of the point i'm trying to make of not depending on strikers like Ronaldo who have a well-known history of injuries.
Maybe the emergence of Borriello or another prolific striker can fit Milan's needs. The other thing is that not many strikers in Italy have given 30 goals a season without defenders forcing them on the injury tables for lengthy spells, so I wouldn't be too picky about selecting prospects that are not 30 years. You'll get 3 years out of them, then you can look again. Players are always emerging.
JOGO BONITA!