- Do you have any reliable contractors who have experience in doing rehab work for your properties?

If it was a private showing, the realtor may have left after they locked the house up. 

, should I open an LLC to lock in my REI company name before I make the cards, is that not necessary?

It helps you find reliable property management partnerships and gives you everything you need to make confident hiring decisions, like:Expert Matching: Match with professionals who meet your criteriaExtra Assurance: Licenses, experience, ratings, reviews, and more that can be cross-checked with BiggerPockets membersBonus Content: Receive an essential interactive workbook: “How to Interview Property Management Companies”

Where have you had luck finding reliable ones that can support your business?

Come to think of it, there's not really anything I can think of that they offer that compares to the reliably up-to-date information that Grant Street and other sites I use regularly offer.

If you had a locked box outside, I'm sure one of the tenants would say one of the other tenants stole their package. 

Section 8 can be reliable in that you are mostly paid not by the tenant and on time, but they come, most of the time, with more tenant issues and low appreciation.

Some of them wanted to escape the BLM riots and lock-downs, others watched YouTube videos and decided to invest in real estate.

It is a great area to invest in and, as Jan mentioned, there are folks you can network with here to find reliable professionals to check on the properties for you.