I am used hashflare.io as Cloundmining before, but they are not rentable now.
The cheapest cloudmining i found is now avalon-life.com because the organsation is non profit and grow in a DAO
They mix the mining with X11,X15,SHA256,N-Scrypt,Equihash,Scrypt to get profitable.
The hardware run with solar und geothermic energy.
The mining coins always exchange to BTC.
A actual mining report for 1000 MH is a weekly payout 0.13 BTC.
Cheapest cloudmining service?
Well, I think I would start from that every cloudmining site should be considered as scam/ponzi in the moment you see it.
As the history has shown us, most of the websites offering good payouts from cloudmining or different kind of financing (HYIP) has ran away with money of their customers.
So, you say that avalon-life.com has access solar and geothermic energy supply right?
Can you show me the photos or the proofs that they really say the truth?
Isn't saying that I have many solar panels and a lot of mining rigs great way to make a ponzi site?
You just offer people buying fake "shares" at your website, for getting weekly payout lifetime- after all, you have unlimited energy so you can mine bitcoins till the end of the world right?
Grow up, HYIP/Cloudmining = scam, not an opportunity to invest.