During this learning process, you also need to become VERY familiar with local landlord and tenant laws, as well as Federal and State Fair Housing, and the Fair Credit Reporting Act.Next you need to determine what YOUR "standards" will be.

Whether 3rd party management or self-managed, all the properties should be on the popular OTAs.

There are a few federal and provincial programs to help with the cost of renovations if your property qualifies.You could also likely find something a bit bigger, and renovate as you save the money to do so.

If it's your business system, some of the more popular providers (Dialpad, RingCentral, etc.) come with a built-in spam filter for high-risk numbers and robocalls.

The issue is federal regulation dictates how much a lender can charge in fees compared to the size of the loan.

That's still 30% federal.

He appealed, and the federal court ruled that discrimination need not have actually happened nor have even been intended for a fair housing violation to have occurred.

Regulations constrain markets, but they vary in size and can be contained within each other (federal regulations -> state regulations -> county regulations -> local regulations -> HOA's, for example).

The legal risk - local and state and federal tax law changes are real (and not just airbnb restriction law changes though that airbnb example is easy for most people to see). 

My big 66k federal student loan pile is at 5.75%, while my 10k student loan pile is half a 9.5% interest loan, and a 14.5% interest loan...both variable.