Opportunity Zone Fund and Mortgages and BRRR strategy

[Katie Notch]

I'm looking at starting an Opportunity Zone Fund & LLC. My question is if I sell a current investment say for $200k that I purchased for $100k and made $50k in improvements (so $50k gain). Can I then mortgage the house and transfer the money the bank will finance back into the fund? And then once I purchase another house and improve it, rent it and mortgage again, can I keep going? Basically, keep using the original fund money, add houses, put mortgages on them, and keep rolling forward. And then 20 years later, when I go to sell them, will all the gains be tax free? And can I pull out the original $150k investment (before the 50k in gains) at some point without any issues? Ideally once I had rent money coming in and also other sweat equity gains from improving the properties, I'd like to get the original cash back out.