Subdomain or Domain ?!

Hi.
Let me give you an example...

X # c*m : 6 years old domain

I want to creat micro-niche / niche sites...

student-loan-england # x # c*m
student-loan-england # inf* or c*m

are they same ?
cuz I dont wanna pay so much money. I want to creat 50 niche site per day...

* = o
# = .

thx

They aren't the same. Subdomains have less "value" to Google, but it might get benefited from the 6 year old domain IF it is an authority site. Don't go with .infos

Yes you can rank with sub domain just take it as normal. For example when you will search "blogger templates' on google you will see a blogspot result on 2nd no. and there are thousands of examples like this...