By the time I purchase my rental property I will have 20% so should I go ahead and get the conventional loan so I don't have to worry about PMI? 

Section 1031 in the U.S.A. is considerably different and allows you to exchange (upgrade) assets.I would also disagree that having four residential mortgages in your own name precludes you from seeking additional ones from conventional lenders.  

The contingency for owners of multi-family properties is that they cannot proceed with evictions against tenants who are directly impacted by covid-19 during the forbearance period.I have a few other properties (2 & 3 unit properties) that have conventional financing and insured by Fannie Mae, I am prepared to withhold April's mortgage payment on these properties until the rent payments for the month shake out and I see what the NET collection number is.

I used to have a credit score in the 760s but I bought a distressed property and used credit cards to rehab it, causing my credit score to drop to around the 600-620s, but my plan was to do a cash out refi on 5/1/2020 (that'll be 6 months since I bought the property via hard money) so I can pay off the debts.Is there anyone who can lend 30 year fixed conventional investment loan with lower credit?

You can't do any conventional A paper residential loans in the name of an LLC. 

You need to research an Article V Constitutional Convention. 

-while a large group of residential tenants are asking for help with rent that is due (this is a bit disturbing in that we have not even passed a pay period for many tenants which shows that many do not have an emergency fund in place) I am getting much fewer requests like this compared to the percentage of commercial tenants asking for help (i would estimate around 6% of our residential tenants so far although I am sure more will contact us soon)-many owners of residential rentals have conventional loans which in my opinion will have a greater chance at qualifying (greater than a commercial loan) for the government programs that I hope will roll out soon.  

Since it wasn't conventional loan their fees and rate etc are little high.

Conventional/FHA financing is 99% of the time not an option.I then refinance out of the short term loan into a long term loan.  

Conventional 30 yr fixed with 24% down through a local bank.