Cumming, GA to be more precise.

Welcome,always nice to see another member from Tampa on board.This is a great time to begin in Tampa,there are still plenty of under priced gems in certain neighborhoods here.Besides all the great information here on BP I recommend looking at a ten year price chart for each house your interested in and see what they were selling for(or the estimated value) in 2006-2007.Some free realty sites like Zillow include charts,estimated sale and rent value.They are very rough estimates though that are within a 20% margin of error,there are plenty of errors but it is helpful to gauge the sentiment in the neighborhood. 

I have yet to find anything more precise

First, let me congratulate you about getting your hands dirty, Not everybody is courageous enough to take action.I understand your reluctance to put real estate under contract if you don't know your numbers. 4 units is still considered as residential and you should be good to go with residential numbers (although I would be very precise in this case).

I am a 25 year old living in South Florida (Broward County to be precise), and will be getting ready to purchase my first home in the next 6 months to 14 months.

Less than one year would be at Short term capital gains ratesOver one year would be long term capital gains rates Chart below:https://www.marketwatch.com/story/your-simple-guide-to-the-new-capital-gains-tax-rates-2018-04-16

I precisely explained this to the brokers I spoke with, yet they are suggesting that the loan will show up on my credit either way.

LADBS publishes a chart with the answer to your question.

It's possible that your agent's broker doesn't allow her to be precise on pricing strategies. 

Chart out prices over the last 40 years in Toronto and you will see that it is far above that long-term trend.