We are differing on the utilities, maintenance, capital expenditures, and vacancy rate.  

So how is the normal things included in the Hoa payment like water, sewer, garbage, utilities, etc getting paid or taken care of ?

The primary Team members are typically Attornies, real estate Agents CPA's (or accountants), Inspectors, General Contractors, and Handymen.   

The market is going to dictate what the typical percentage of purchase price you can reasonably get per month.

I am a new Realtor in Florida and wondered what would be the best strategy to implement when looking to begin the REI journey outside of being a typical Real Estate agent?

The 401k loans are not as easy to utilize and can be limited depending on the rule of your plan and group.Best of luck, can't wait to hear how this goes.

Doing the math I figured with a 4 bd home I could rent out each room for about $500, $600 for the master bd, is $2100 gross rent minus the holding costs of utilities, mortgage, cap ex, etc, (1700) = $400 net cash flow (calculating if I didn't live in it, if I did I would be paying out of pocket $100/month to live with 3 other people).  

Asking Price: $695kGross Rent: $54645Gross Multiplier: 13.30 (According to MLS)CAP: 5.1%NOI: $36,066 - they didn't factor in vacancy or management and I believe the posted utility cost is lowMy Estimated NOI: $25115$25115/ 0.051=  $492,500Is it unreasonable to offer $492k - $520k?

Purchase price: $600kRehab: $120k (Includes labor, finishes, taxes, insurance, utilities, etc...)Commissions: 2.5% = $20,500Sold for $820kProfit: $79,500BEFOREAFTER

I realized in doing this post that if Zillow were to actually utilize the data that I and other agents have given them that they could increase the quality.