That's a good start.The 16% Solution by Joel Moskowitz is a popular book.

And I see a lot of those types of prices still prevalent in very popular areas.

The chart below shows the key economic and demographic factors for some of the most popular markets.

Those 700 sq ft 1/1's and 2/2's right on the beach can  be popular, but as you mention, I'd need to be really educated on the rules they may come with.

Jeff, As a popular author here on Bigger Pockets recently wrote, management companies will typically never view your property as important as you do.

"Cash is king" is a popular saying for a reason.

Last five years,  neighborhoods like Hampden, Remington became popular neighborhoods, there are tons of areas where people can invest safely and still get good returns which I very much do. 

I have an unsecured Personal line of credit with TD bank I believe its interest range right now is in 10% range which is better than what most CC offer unless you're getting one of those special 6 month to a year special Promotions..Yes a lot of BP members do talk about getting line of credits the most popular would probably be a HELOC which is a secure line of credit would give you the best rates..

We're finding this especially popular among those investors who you mention use that short term, 6 month hard money. 

I wouldn't buy rentals FAR out at all, but depending on area, many of our local rural areas are very popular and rent up quickly.