I have looked on the Arizona real estate website and all I could find was the addendum, I would really appreciate if someone here already has that contract and is willing to share it with me that would be great.

BiggerPockets website is good for the American market (mostly) but you will also find lots of Canadians on here and some good info on the Canadian market just by searching.There are worthwhile local West Coast resources for learning real estate investing in general and the Canadian and Vancouver markets in particular.

Then buy out my partners on my Costa Rica properties, and just host retreats in Costa Rica, visit my cabins, collect cash flow, and enjoy my wife and kids and travel around visiting friends in my awesome motorhome which I have not purchased yet. great goals.. mine is to buy a nice drift boat and flyfish all over the west and up into BC. trying to figure out do I buy a summer cabin say in Western Montana or Eastern Idado as a home base..

I have my doubts about how much hosts are actually making.

If your current lender can’t accommodate you, explore STR-focused lenders like Host Financial or Lima One Capital, or consider bridge loans to buy time while you build your rental history.

As for Alfonso, the website is one of the most UNdescriptive scammy sites I've ever seen. 

I reccomend using the website below to get exact numbers for taxes in Memphis. https://www.assessormelvinburgess.com/propertyTaxCalculate

I keep finding conflicting information and the IRS website doesn't specifically mention using an RV as a STR.

The book is already available on the website but I did not know that at the time! 

You can also listen in on Rob Abasolo's Youtube channel (Rob is one of the recent Bigger Pockets host) and you will learn a lot from him.If this group offers an opportunity to invest with them or their properties, then it may be worth the price.