How much money, after expenses and taxes would he property make yearly?

The area has certain advantages like shelter from regulation risk (pretty much as low as anywhere in the country if you buy in the approved STR tourist zones) and long term security (people aren't going to stop going to Orlando anytime soon). 

It would/could be only 15% capital gains tax and yes you could/would deduct all selling costs including commissions and transfer taxes.

Check with your municipality about how property taxes will change when you buy the place.

I know that the general guidance is that emergency funds aren't to be invested, but given our financial security and the fact that we already have a personal e-fund in a safe, non-volatile location, would it still be crazy/unwise to invest this 15k in an S&P500 index fund in a brokerage? 

I've been using the GE  GFW148SSMWW // GFT14ESSMWW models which comes to $1,650+ tax for units and stacking kit. 

Loan Security: The property will serve as collateral for the seller-financed loan.

Originally posted by @Duane Alexander:Can resimpli replace propstream to look up property information like remaining mortgage, tax information, liens, mls history, mortgage transaction history, etc?

To transition to multi-family properties, research landlord-friendly states like Texas, Florida, Tennessee, and Indiana with favorable eviction laws, lower taxes, and higher rental demand.

High taxes.