I find it comical that the OP, a newb with 11 posts, posts some pretty short-sighted assumptions then gets pissy when people apparently don't disprove his nonsense... even though many posts have done exactly that.

One little nugget for you OP... if you are not already in mining (with paid off hardware, etc), you most likely will not be able to ROI any new rig you put together.  The only way current miners are able to stay profitable is to sell there old GPUs and turn around and build upgraded rigs that provide high hash-rate.  So for instance, the cost me going from a 6x R470 rig to a 4x Vega 56 rig is really only about $400 out of pocket. ($1800 for the Vega's less $1400 from selling off the 470's).  That new rig will get more than 2x it's current hashrate on all cryptonote coins which will enable me to ROI that extra $400 spent upgrading in about 2 months.  However, if you're builiding that 4x Vega rig from scratch you will be out of pocket about $2,500 and unless XMR goes to $1,000, you will never ever ROI that rig.

So bottom line... just give up lol.  Orvif you want to be smart just invest that money into coins and stop worrying about trying to figure out things you clearly have no comprehension of. ;-)