I work in Boulder so I wanted to see how to drive was before buying in Denver.

Real estate sales is like any sales: your reputation will play a huge factor, which in turn becomes a word of mouth situation.

Enviorment has a huge factor on that.

That could change depending on where you buy, what you buy, and some other factors...but that is probably a good ballpark. 

They will NOT give you the name of some fly by night crew that drives a station wagon with a ladder strapped to the roof.

At the same time, I'm hoping to start investing via a small multifamily building somewhere within a reasonable drive of that area (looking as far as Philadelphia area but ideally closer). 

hd=13) Virtual driving from Fountain Square to  wholesale districthttp://youtu.be/PVB1LIYhi2I?

Yes this is the cost of doing business, and you should factor your business such that your taking these additional costs into account.

□If you have employees who drive during work, do you require them to have or provide them auto liability insurance in an appropriate amount?

You are also going to need to carry insurance in every state you are licensed in, which will drive up yoir costs.