[Beginner] Which miner has the best return if my budget is $500-$550/pc?

I'm actually gonna set it up on my backyard. Electricity on where I live is $0.0021. I'm planning to get 10 pcs as a start. Thanks!

Edit: electricity on where I live is averaging $0.0019 per kilowatt hour. I just put $0.0021 for the highest rate in the whole year.

Submitted August 04, 2019 at 10:52AM by emmannunez http://bit.ly/31aQSMW