I just don't really know how different ratios are weighted when it comes to a credit score.

so called negative weight.   

Investing hubs that cater to warehouse workers, manual labor jobs, and retail fulfillment need to start considering putting more weight on job diversification.

Our rentals are managed by a property management company, so they handle 100% of the fix-ups that are required (a good property manager is worth their weight in gold).

With available technology today, the MLS doesn't seem to have nearly the weight that it used to... but the access fees remain high.On the buyer/investor side - Do agents get "early access" to property listings? 

I am new so I don't hold much weight against the other experienced members here (so please correct me if I am wrong), but I agree with Jeremy.

They may offer some warranty or guarantee to limit your loss, consider that such are probably tied to a portfolio to replace your note, it's probably weighted in their favor, it may be a good cover to use to limit their liability to appease an investor when things do go wrong.

I wouldn't put much weight on using Trulia or Zillow. 

You'll also be personally guaranteeing mortgages made with institutional lenders and it's your personal credit that carries the weight.

Markets that have potential for big appreciation run up are not going to be 2% rule markets... you must weight these factors plus quality of life..