I just got a HELOC on my investment portfolio, so I can buy my next building with "cash".I dumped all my operating funds in my HELOC to minimize the interest.Now, I get a wrenching gut feeling that this HELOC can get frozen and I won't be able to buy anything new.Please, give me an advice: what would you do?

I used to collect rent from my tenants and I wasted so much time and just overall annoyance by trying to track it down.  

If you're not ready to really invest yourself into the process, then you shouldn't waste your time or money.But... take pride in the fact that if you do this, you're starting in at an early age. 

States are proposing laws that waive rental payments for several months with minimal or no reimbursement.

Be honest and don't waste their time, but I think you will be surprised how willing they are to help you and to try and earn your business.

I definitely will look to minimize my risk on the first and try to use it as a worthwhile learning experience!

If I'm already in the 20-24% tax bracket, what would be the best way to grow 100k-300k while minimizing the tax burden (while keeping it somewhat liquid)? 

I’m just closing on my third SFH rental using a traditional buying strategy and will be all BRRRR going forward.If doing BRRRR deals, aren’t you essentially recycling your capital again and again therefore minimizing new expenditure?

Keep a sell order at ~90-95% of your investment to minimize downside risk.25-40% in state and municipal bonds.

For people traveling to Orlando to go to the parks this summer, I have to think that a lot of them would rather stay in a vacation home than a hotel to minimize contact with others.