To earn 1M per year with let’s say a combined return of 8 percent requires principle of 12.5 M.

All I do to show proof of funds when making a cash offer is take a screen shot or printout of my online bank account summary, making sure that it shows my name and that the total available balance is higher than my offer. 

I really want to tour the properties I already own as well as get to know some of the neighborhoods that I'm looking at online daily.

They are usually pretty easy to find online.

It's just a part I'm having the hardest time tracking down - spent last 45 minutes looking online. 

In my parting message on checkout day , I include the line ,"we strive to provide 5 star service and hope that we have done enough to earn your 5 star review".

We’ve read a lot of articles and advice online as well as here on BP on what to look out for and be aware of.

You may think you are not "representing" them, but by law you would be considered to be acting as their agent, though illegally.Just because someone writes up an article and puts it online, that gives you instructions on how to do something doesn't make it legal.

And lastly I would use an online service for rent collection such as cozy.

I think NRIA is only open to accredited investors so more detailed info may not available on line.