Just one question per call is all you need....then follow those leads.I would also say, grab another agent or two in your office that is new.....tour every single house that your brokerage has listed.....ask the agents in your office if they have listings you should tour and leave them feedback....that way you get to know prices, neighborhoods, conditions, etc...and get to know all the other agents in your office. 

I've done construction for about 20 years, so I waived the inspection in lieu of touring the property myself and inspecting the "bones".

It sounds sort of cliché but getting out to REIA's and property tours in your area would help a lot.

My parents would call me out of school to tour the colleges around us, because the school wouldn't let me go.

It took a few months to get it rented, but my property manager got a military family to sign a lease before they even arrived in town based on the video tour and pics.

It really depends on your personal skills and the honesty/skills of those working for you.If you have a knowledgeable agent, they can walk the property and shoot a video tour with you.

But they are also asking for all the marketing material (including photos I paid for, 3D tours I paid for, etc).

This is why I hate when RE agents say when touring houses "oh we could just open up this kitchen" without knowing whether walls are load bearing or not.

If it's your first investment and you haven't personally met the sponsor yet, then I'd recommend you spend the time/money to go tour the property, meet and talk to the sponsor and ask all the questions you have.

I'd reccommend this tour and it is really inexpensive, yet first class.