Try and visit a Frat House in Miami...did you ever watch Animal House?

On the rare occasion, I visit a property, the tenants know me as Mr.

Do companies exist to help out-of-state investors visit a property, take pictures and verify that the property is in a good area?

Typically it's never going to be feasible to visit a long-distance property more than a couple of times a year. 

Have you setup a webpage for them to visit as well?

Before you even think about making an offer I would advise you to visit a property management company.

Perhaps to visit a rehab, rental or property they have for sale.

In washington state they would also need to call it an estimate visit as doing a home inspection without a license is frowned upon by the state.  

A couple for you for my own edification which I don't have a great solution for thinking about it.Suppose I am an out-of-state real estate investor.And suppose there is some probability of any particular A class neighborhood turning into D class in the next few years.Suppose also I go and visit a target neighborhood/zip code and underwrite that the place is good to invest in.

So...2) Visit as many local (active) RealEstate clubs, or REIAs as feasible and ask everyone you meet, "who are the active investors in this part of town?"