There's already a lot of noise/options/competitors in the space - each promising what you mentioned, and then some. 

How should I calculate a for doors to income to know roundabout what my goal should be?

It is expensive but money is not cheap at all nowadays and as others mentioned even getting a LOC against a rental property is a huge score as not many lenders are lending on that product.Question I have is what are you using the $ for and can you earn it back? 

I would ask in what capacity he worked with all these celebrities, and why the only mention of it you can find is from his own website and bio.Then on to the actual promise.  

When we last spoke he mentioned he had covid and his phone has been shut off, but he was planning to be at the house the next weekend with rent and all the late fees ready to go.

It would take you approximately 11 years (not factoring in rent appreciation) plus that doesn't factor all the systems you mentioned that need replacement.

I mention that because I realize that requiring that much up front my limit my tenant pool. 

My PM mentioned these folks and after some time we foolishly gave them $600 - $300 for our property she manages and $300 for her own property.

Also Byram was mentioned I bought one new build there but it was to close to SOJACK and that tenant did 30 k worth of damage..

Although the concept of a remarketing campaign has been around for over a decade, it often only gets a small mention in various courses.