But my understanding is that it's a numbers game.

U can have zero experience and just need a few bucks and a  good credit score and you can buy a home to live in or a rental.. but not development deals.. different ball game

It's good to hear that you want to play the long-term hold game as that is how you'll ultimately build equity.  

A prominent MLO in the northeast was recently charged and stripped of his license for playing this game with his borrowers.Also, everything is reviewed by underwriting.

I'm fairly new to the real estate game and currently have 2 properties; 4 bed 2 1/2 bath renters have been in there going on their 5th year, and a new 3 bed 2 bath we're looking into using for a midterm.I work as a radiology manager for Methodist and been with them going on 10 years.

RE investing is a numbers game so the more properties/options you look at, the higher the likelihood you'll land a good deal in a shorter amount of time.Only 6% of Suffolk 2-4 family properties listed since '23 have been triplexes and quads. 

It's only been a week, but what are my options if they do not return and the RV just sits in the slot? 

You can utilize hard money for a BRRR or flip to get into the game. 

I am looking to get into the real estate game early and learn as much as possible, especially about house hacking and possibly short-term rentals.

It's part of participation trophy society where people get socially rewarded for just being in the game, but that shouldn't apply to real estate.