I assume you're referring to altcoin mining? Because it simply isn't possible to ROI within your given time period with Bitcoin mining, unless the price literally explodes to $4000-$5000. Other than that, the benefit of an altcoin rig is that you can switch between different profitable coins if the one you're mining isn't that profitable anymore. And yes, eventually you could even sell your hardware to recoup some of your money.
Precisely that alt coin mining will give you faster return instead of bitcoin mining.
Altcoin is a better way to mine these days as bitcoin has higher difficulty and it is increasing after halving.
ETH is currently the best coin to mine right now and many miners earning for that but maybe this one will be unprofitable also when ETH mining became congested and we will surely cry for the cost of lost if our miner will be outdated so much better if we just spend our capital on different ways since we can earn more a lot if we just seek for better business here.
Yap everyone is mining ETH nowadays because of the near change of it PoW to PoS many wants to get as many as they can before the change happens.
We don't have an idea if there will some congestion to ETH transactions in the rear future, no one knows.
Well if ETH mining will be congested then we should find another alternative coin Since I know Their will be another one who will step up on this matter but for now let should grab the oppurtunity to mine so that we will not be late if ETH difficulty will go harder as we tought.
There will always another contender in the market and we don't know if that is XMR, NEM or Dash.
We really can't tell. But just always don't get into cloud mining, it's just another way to scam your capital.
Don't be like me before that is thinking this is a good way to earn but I failed and ended up as a victim.