They have no understanding of compound interest, time value of money, return on investment, cap rate, or anything involving math of any sort10.

And, based on some really basic math: if that lifestyle costs $2mm/yr (the leased/financed G5, the FL and Malibu mansions, etc) and the typical core multifamily deal kicking off 4% cash on cash to LPs (if that), we could all have that lifestyle too.  

Some landlords offered more expensive rent for a 9 month period but the math didn't really make sense (half month savings at most) compared to a standard 12 month lease. 

His entire math for this "Plan" only works due to the above dynamic. 

That's double if I'm doing the math correctly :-)I think that takes a lot of nerve.I would say NO.

It's all math. 

Messy, but usually effective.So, I would consider the possible outcomes and the probability of each and do the math to come up with an expected value for the cost of the repair.

Some people are surprised by what they learn when they do the math.  

Big developers where not investing as much anymore, land flippers where left with unwanted inventory and if you for example now wanted to do an agricultural business and bought land in some places, the math would never makes sense.The good thing is as you mentioned some small towns are thriving because of the expat presence, similar to what happens in the US with "gentrification" the expats attract the digital nomad crowd that works from the beach, surfs, love great coffee shops and restaurants etc.

There is no mention of the loan balance, just the rate and payment (I did the math on $513 / mo - if it's principal and interest only the loan balance would be $92,900 - so I suspect you're quoting a PITI payment).