All help is appreciated and I feel really bad because my other tenants go to work and have children that go to school and they are not able to sleep properly because of the loud music. 

I personally use a company called swift permits.

In my case, I have residential rentals in one LLC, commercial properties in another, self-storage in a third, and my real estate company operates in a fourth.

One risk I could think of is - Even witb a 20 year guaranteed lease, thr company could bankrupt & may put me in a situation to look for a tenant.

And my IMPRESSION is that with MTR you are getting 1) traveling professionals (nurses) 2) relocating professionals 3) Insurance company temp housing for claimant remodels. 

It's best to invest in a company/fund that does this for you. 

I own and invest in Birmingham and would be happy to connect to share insights and introduce you to contacts in my network.I also work for a local property management company that serves many out-of-state investors.If you come across any properties, I’d be happy to provide rental analysis reports based on comparable rentals to help you evaluate potential investments.Looking forward to connecting!

Some people are sending supplies (clothes, other needed items like school supplies, food for humans and pets, etc). 

Could you recommend a trustworthy and cost-effective company for this? 

Plus the mortgage company probably calls the loan, and if you can't pay it off then you can lose the property.