I also heard about cloud-mining.
Can i use those for mining LiteCoins?
Can you seuggest a good one?
How much will it cost per month for me to pay for resnting it and electricity and what would the profit be?
You're correct about cloudmining: think about this fictive example:
I have a good electricity rate, and buy an S9... If i run my S9, i make 0.01 BTC/day profit... Why would i ever rent out my mining equipment for less than 0.01BTC/day... It just wouldn't make any sense...
So, either cloudminers try to scam you, make you pay more than you'll ever make, or sell the complete risk to you in return for a small fraction of the profits... Neither of these cases are good for you (IMHO).
I don't really agree on your advise for the OP to buy an usb mining stick, nor do i completely agree on advising him to buy an S9.
An usb mining stick will probably never ROI (i did the calculation in a previous post, just to lazy to look it up). An S9 might give the OP some profit, but ONLY if he has a good electricity rate, enough technical knowledge and an appropriate place for his S9. Additional research is defenatly needed before buying any ASIC.