Stockstrader, curious how you calculate the monthly loss from your stories.

First investor: you mentioned he/she lost 6000 a month after receiving your monthly rent meaning that they have to pay $7500 a month for mortgage and HOA and insurance and property tax. That seems a lot for a condo of $405k.
Analysis:
Mortgage: assuming he did $405000 loan at 5% rate: $2174 a month
HOA: $300/month (assumed)
Insurance: none because there is a master coverage for condo.
Property tax: assuming 1.2% per annum, $405 per month
Your rent: ($1500)
To add up: $2174+$300+0+$405-$1500=$1379
where comes the $6000 loss per month?

Second landlord: even worse, he/she lost 12000 a month after receiving your monthly rent meaning that they have to pay $14600 a month for mortgage and HOA? and insurance and property tax. Isn’t that a little too much for a house of $850k?
I am not sure if there is any HOA and the property tax rate in Silicon Valley but I am very interested on how you came up with their loss number? Thank you.