the marketing must be different than a $400,000 home- What aspects of real estate do the multi million dollar buyer look for, As opposed to a couple hundred thousand dollar home? 

A couple of treatments worked for me.

Other items such as having accounts in a foreign country.If you are single/married, with a few W-2's, interest/dividend accounts with one rental property.

Initially, I was using Quickbooks (QB) and then when I go a couple more properties and multiple LLCs it was difficult to manage on QB and required multiple QB subscriptions and this got expensive.

Do you need all this for a couple of rentals?

When someone else is on ownership (or deed/title) then they would need to sign a couple of things at closing to give permission for a lien to be applied to the property they own - but that doesn't mean that HAVE to be on the loan. 

It looks like you're on the right track with your math, but a couple things could help.

You should call a couple local banks to discuss the types of investments you may be looking for.Alternatively, a great strategy for someone just starting out is House Hacking.

Now, some of these answers will depend on what state that property is in, how much equity you have, and a couple of other factors...but you can certainly seek out other lenders about a Line of Credit on an investment property.  

This is helpful and I'll need to do more research into a couple more firms to reduce the costs.