Do the math on how much more you can rent for after a remodel an how long that will take to pay off the upgrades. 

I often use this to help calculate some quick math on deals.

I am willing to do my own homework and actually learn how to invest in real estate and create a system that works for me  

This simply is because both ideas are just math operations and not real things in and of themselves.

So there is inherent danger in commercial that never been talk about, becoz every GP is rushing to buy at discount->to rehab in hurry->to rent it out->to sell it quickly and do the same/repeat, this cycle can't be repeated in basic math because at one point, the cycle would go againts them.

LOL,  math doesn't make sense.

It is all about the math and numbers now.

Be very careful when it comes to vacation homes you need to be very experienced to be able to calculate the exact net cash flow. there is so many expenses that you might not understand, in other words you need to do your homework before touching any vacation rentals especially with the pandemic .

But you’re right the math doesn’t add up.  

It looks as if they hired out to H&R Block and didn't bother to check their math.