I want someone to answer this question, can 4 s17+ pay your house rent?
Each s17+ Miner costs around $1965(miners.eu)
4*1965 = $7560
I assume you are getting it for free or 2nd hand or looted a store during riots 
If the Electricity is free for you, then go ahead you will earn a profit of $27 per day
If you pay $0.10/kWh then you would run into loses, use online mining calculator for your estimation.
If you are planning them to buy new or old one, never do it. It will not break even.
I already buy many before only the light bills I’m talking about let me try my best I can