I'm not sure if we can like to articles on our own websites here, so to be safe I'll just suggest the IRS web page, which does do a pretty good job of explaining the basics: https://www.irs.gov/taxtopics/tc510The main thing to know if you're going to claim business miles is that you do need to keep a log of every business trip. 

Glad to hear the website postings can be a legit source for a deal.

You can hire someone on Fiverr website and they'll add furniture and personal items to a blank photo for a very reasonable price.

I usually print out the market rent provided by Zillow and a few other websites. 

Most people who buy in Costa Rica do it for lifestyle and they might rent (or not) to cover the cost and maybe make a little profit.Unless mentioned otherwise, when responding on that topic I know or I have assumed that people are potentially interested in an investment property, not a lifestyle property because this is an "investment" website and people talk about STR.

I go to e invelo website and I have to sign up and pay again?

No, I'm sure you didn't, especially on a website monitored by the FBI, FTC and others.

QR code in the property —> page on your website.

There's so much information here on BiggerPockets as well as the podcast and books and other websites, books and blogs too that are either free or very cheap. 

That website is traced back to Auction King.com a BBB confirmed fraudulent company and is traded as Government Auction Luxury.