@Mario Morales, to echo Bradley, I would say this depends on what you are lacking in your own knowledge base.To some (probably many investors) the agent is simply an initial filter for them.  

Look for shops that test and offer guarantees.For valued tenants or premium units: New appliances might be worth the investment for their reliability and long-term durability.Ultimately, your decision depends on your goals.

-Max LTARV is typically 75% -Is a 12-24 Month Interest-only loan with a balloon payment - Minimum credit score is typically 600 -Interest on the Rehab is usually paid per the total drawn amount. 

The local investors will need to know their local real estate and rental markets and depending on the infrastructure the investor has in place or is willing and able to build, that will dictate how much time and effort they would need to contribute.

It all depends.

Depending on your practice size and income level, you may just want to start with maxing out 401k and also adopting a defined benefit plan before committing to becoming a lifelong real estate investor.  

Depending on how the tenant works out, might ask you a few questions.

Quote from @Arvand Sabetian: Depends on your unit and size.

It can depend on the property, but owner paying the bills seems rare these days. 

How much depends on what you do for a living.