Because there are so many hospitals and medical students in the Akron and Cleveland areas, there is strong demand for rentals near hospitals. 

However, after weeks of asking and waiting, the landlord finally doctored up a 3 year lease (handwriting/both signatures for the owner and tenant are the exact same handwriting), he refuses to give me deposits of proof of payment, yet insists this tenant is a great tenant.

I’ve read the books and listened to almost every podcast and me and my father (77 year old ex project manager for medical arts buildings) are looking to get started.

Your doctor will speak to you using Greek terms as he's supposedly trying to communicate with you.

I have also noticed a lot of successful investors invest near medical center and rent out strictly to medical staff that travel in the area.

See if the in place tenants are STICKY.For example an office medical tenant has tons of tenant improvements and can be harder to relocate.

Even undocumented kids in CA get free medical care. 

People retire, people do 1031 exchanges, liquidate, switch to different asset class, medical bills, loans..list goes on and on

Isn’t he a doctor?

If it is medical or student loan it is low risk, if it is consumer debt it is medium risk, if it is utilities or items that look like it could be prior landlord claims it is high risk.