Hey buddy. So here a quick view of Brazilian prospects:
Neymar - right now impossible, maybe in 2 yrs for 50M
Lucas - 20-25M - despite his problems when it comes to decision making, vision of the game, intelligence on the pitch, he would improve dramatically our RW. He is as hardworking as Pepe, but 1000x more talented. Would be a great solution for the position. Should cost around 20-25M. Pretty expensive.
Damiao - 20M - he would be a great fit, I guess. I agree he can't be the fist option, but if we can't get Cavani, I say get him. His agent has already said Juve has the priority. Skilled, strong, quick, natural goal scorer. Price around 20M.
Ganso - 30M - Amazingly gifted, bright, awesome passing. But low working hate, low stamina, low movement off the ball. Not suited for Italian football, should cost 25-30M. Not worthy IMO.
Oscar - 15M - plays with Damiao. Young talented midfielder, is becoming a regular in the NT. Can play as a AMC or on the right side. Is smart, good technique, but a little bit slow and soft. Today wouldn't leave for less than 15M. A gamble for the future, but think his potential is unknown right now, high risk.
Wellington Nem - 7M - plays for Fluminense. Very very quick yongster, left footed, plays as an offensive winger on the right or left. Good dribbling skills, excellent speed, stamina and work ethic. The best youngster of the last Brasileirao, recently called to the NT. Isn't very smart, though, and need to improve his finishing. But is very affordable. For something around 7M he could be bought. I think that if there isn't any other non EU player to be bought, would be a good acquisition.
Dedé - 10-15M - central back in Vasco. Is injured. Very imposing, commanding central back. Awesome attacking, has remarkable speed and agility for someone as tall and strong. But commits positioning mistakes every now and then. Even so, is by far the best defender in Brazil, is in the NT and tends to be in the starting team along T. Silva. David Luiz shouls be in the bench. Would be the best possible acquisition for this position, benefit-cost wise.
Casemiro - 15M - central midfielder, defends well and has amazing skills for a defensive player. However is overrated IMO, and is too irregular. Unreliable. Not worthy.
Fernando - 10-15M - central midfielder, Gremio. 17-18 yrs old. This kid has amazing potential. Plays as a CM, defending and supporting the attack with extreme technique. Very, very skilled. Pretty quick. For 10M, would be a good gamble.
Montillo - 10M - Classic ACM. Argentinian, around 27 yrs old. Plays for Cruzeiro. AMAZING player. Very very good. Quick, intelligent, hardworking, great set pieces. For 10M would be very worthy, I don't know if he has Italian passport. He's a beast here, but isn't famous abroad because of the age. Plays in Giaccherini position when he is in the midfiled.
Romulo - 8M - Vasco - central midfielder, around 20yrs old. Good player, good passing. Could be in the starting team of the NT in the next years.
We have some others, but these are the main youngsters around here right now.
And special mention to Ocampos, from River Plate. Watch a few videos in youtube and be impressed. He is truly amazing. 17yrs old, tall, quick, strong, stunning skills. Winger. Reminds me a lot of Cristiano Ronaldo. For 20M, he would be a wonderful bet.
Buy on AliExpress.com
I must spread some reputation first. Thanks for the insightful analysis 
Giovinco