I found a cheap r7 370 and wanted to see if I could make some profit off of it but I can't find the hashrate online anyone mine with the r7 370

I found a cheap r7 370 and wanted to see if I could make some profit off of it but I can't find the hashrate online anyone mine with the r7 370

I recently came upon a very cheap warehouse for sale.  I thought of mining bitcoins in it right away.  But I am 13 and have no idea about the expenses. Should I buy the warehouse and put GPU miners or ASIC miners>? I only have a 4 GPU miner now. How many miners should I have before I move into the warehouse?