When it comes to estimating taxes it obviously depends on the state and your tax bracket primarily since flips are treated as an exchanging of inventories - like selling a newspaper almost - so for that reason its hard to give a specific number...

My first duplex I found in the newspaper and used the traditional 20% down to purchase it.

Ones who advertised on half a dozen pages in the newspaper.

It is about as good as an ad in the newspaper.  

In order to save time when showing you can have an open house; advertise on Craigslist, newspaper, etc., mention that you will need prospective renters to bring id, proof of income, references, $ for credit check, etc.

@Matthew Shedd If you're still interested in Marion Oaks, you may want to check the new construction going on in that area re: Ocala Star-Banner newspaper or CEP.

Local newspaper and called seller direct.

When I was working newspaper ads and bandit signs, I'd talk to 100 people to look at 10 houses to buy 1. 

Good guidance by @Ryan Blake Additionally - local newspapers post foreclosure sales and auctions.

Yeah, it seems hard to justify the costs on some of these things, especially FSBOs because they are so easy to find on Craigslist and local newspaper sites.