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?

Rolling closing costs into the interest rate is essentially inverted discount points, and discount points are proportional to loan amount, whereas closing costs are mostly fixed.0.5% of loan amount is a lot more on a $700k deal than on a $123k deal, and those are both going to have ballpark the same closing costs.

Essentially you are saying that you want to put all your eggs into one basket, no room for error, no emergency fund for yourself or your properties, only to have cashflow of $22.6K that is likely barely enough to live on let alone reinvest, and just hope you always have renters, nothing breaks, or the economy doesn't experience a downturn.  

It's essential that you know, however, that SHOULD your buyers default on their payments to the 1st lender (you are the 2nd) then in order for you to protect what's remaining owing to you on your note ($50K in this example - the payments they make before defaulting = $45K, for example) ... so in order for you to protect your money, what's owing to you, you will need to keep the 1st mortgage paid up and then YOU will need to foreclose on the owners/currently buyers.  

The reasons wholesalers make money are essentially 1) speed to close, and 2) large deferred maintenance that precludes typical sales.

A lot of lenders may tell you the appraisal is free however its not free if you dont close you will still pay for the appraisal typically (its only free and credited back at the end or at the closing table).The other part is to make sure rates are where you want them to be (low enough).  

If curious for some behind the scenes stuff, we talk about it as if it's "Fannie Mae's money," but typically there are other secondary market investors that'll pay a little more than Fannie for loans that happen to be above her minimum standards.

The banks typically want to see some track record before letting you GC your own builds, especially since it is not your primary house (I know my bank does)Most builders only doing a few houses will be at a % agreement, and if you do get them to agree to a flat fee, they will likely just figure out the % of the build, and give you that number.Something to consider, if you dont have experience on builds, cost plus could really get you.