I feel landlords first should not be able to have rentals if they can not provide their tenants with mailboxes and registered addresses.

Have you looked into who provides each utility?

They could also retaliate by taking unfair deductions from your security deposit.

—as security for a loan, the borrower has a contingent liability.

In most leases, the "quiet enjoyment" paragraph is one that explains the landlord's obligation to provide quiet enjoyment. 

It is in their best interest to allow you to show it so that if you can secure a tenant prior to the end of their lease they will have a "rent refund".Including a sample of our 360 imagery we use for marketing: https://portfolio.zinspector.com/tour/OR4zL9dqx06EK7av4GRXljoGbmWA1PZw 

On the other hand, the 7.35% 30-year fixed provides long-term stability with a predictable monthly payment throughout the entire loan term.

A good sized closet.The IRC provides some other benefits as well.

@Jihan Lee I can assure you that you've already taken one step in the right direction by joining this community that provides you with a wealth of resources to help you with real estate investing.

However they must be installed by my handyman and I set the expectations that they have 2 choices when they move,1) Leave the wall mount 2) Take the wall mount and repairing the wall back to original condition will be done by my handyman and will come out of the security deposit.