Your first step should be to check the Zoning.

Invest all cashLeverageBuy in syndicate Lets assume someone has say 100-500k in cash and is looking to invest in todays market in MF  Why would you pick one method over another and what would be your expected return etc. 

I now have 5 rental properties and they are all occupied and cash flowing nicely.I never used the BRRRR(an acronym that stands for “buy, rehab, rent, refinance, repeat.”) method until recently when I purchased my 4th rental due to the amount of equity I had from this property.

i here so many different steps that its making the process confusing just need to get pointed in the right direction  

Don't step over dollars to pick up dimes.

So many people never take that first step toward actually buying an investment.

Another step I have found is property managers that specialize in vacation rentals.

If I were to purchase this boarded up row house, what are some steps i can take to prevent vandalism and theft (ie copper)? 

Depending on what type of underwriting method a Mortgage Broker found most suitable for your scenario + your credit score, you could get slightly lower interest rate although 6% is a good number to plug in to be conservative.  

Is someone willing to step-up?