If you locked in a better interest rate when you bought the house then you might end up loosing it  and replacing it with the current higher interest which could cut into your cashflow. 

So it is possible that the appraisal comes back lower, but then if you have already signed the contract you are locked in.

I have read from other that if you are near the ocean the salt air can affect the lock.

They mentioned that the rate will be higher if locked for 5-6 months.

80% of traditional mortgage payment is interest regardless .You'd rather be locked into a rate rather than it consistently floating . helocs can also be locked or decreased at anytime by the lender 

Hey Earl, I sent you the link for the book's bonus.

Guest checks in, i double check camera to make sure no issues getting in (sometimes people have issues using Schlage lock.

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?

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