Its just its not me who paying for it
Have one question
While you mining will you get a daily return
As said in the profit calculator
Or I have to wait to find a block
okay.
mining solo your chance of getting a block is around 2200 to 1 each day with an s-7 and the odds will most likely get worse.
mining with a pool you earn a little piece every block the pool makes.
depending on the pool you could let the coins sit and grow then move them when they get big.
at todays odds an s-7 earns close to 0.011 btc or $7.40 usd a day.
since your power is free I would suggest if you can get a good deal go for one s-7 and find a good psu.
if you want a good psu read this and ask me any questions you have about getting this setup.
https://bitcointalk.org/index.php?topic=1373092.0