This exact debate happened several years ago and lead to one of our most active members leaving.
I am assuming you are a fix and flipper. You may even be a wholesaler, not sure.
I am a buy and hold REI. Fastlane growth is exponential growth. You have the background to know where the limitations of exponential growth lie in REI.
1) Getting fresh product requires manpower and feet on the ground
2) Getting a buyers list or a buyer for your SFH requires networking and marketing
3) Dealing with contractors and employees is sometimes a hassle
You have to figure out how to get properties without your involvement. You have to have buyers fighting to get your properties. You have to have a trusted manager to handle all of the people challenges.
Even with that you don't get exponential growth. All of that work just maintains the status quo.