@Allan Wu take into consideration that tenants are not going to be as careful as you would be, so make sure your lease states no flushable wipes, paper towels, feminine products, etc., that easily clog and that they’re responsible for repair if used.

We use a lot Zep products on our houses. https://www.menards.com/main/p-1642874257675632.htm?

Many people on these very forums said they weren't going to buy unless a deal penciled at 20% vacancy with 10% annual rent declines for next three years.  

If they don't want to be cooperative and productive and speak civilly, I will simply let them know the actions I will need to take and if I need to I'll take those actions. 4.

It's a product of people wanting to hit the easy button.

In addition to FHA, I have a conventional loan with the option to put as little as 3% down as well a speciality product that has lower rates if the property is in a designated area.

Many lenders offer DSCR products on 30 year fixed terms.  

For DSCR, a 3 yr prepayment penalty and paying 1-1.5 points will put you pari passu with Conventional products right now for the most part. 

The reduced demand causes rents to decline but at the same time the tax base is eroding from the employer closing up shop causing property taxes to spike up.

The population could decline and we still would not have enough housing but with a steady population we are significantly short housing.