That said, I've toured everyone's house, and I added the most upgrades in my area by a good margin.How much value will an appraiser account for in terms of the 45k in upgrades? 

@Chris Scott  A low-tech way of solving this problem is to "tour" the site by claiming you want to rent a unit.

You can also gain a lot of information attending local property tours and get a feel for rehab numbers.  

I toured a 12 unit property where the numbers looked good, I liked the location and layout, but I found out that the whole thing was constructed with 2x4's.

Perhaps tour a property and stop into the management office and visit with them.  

With the integration of interactive virtual tours (not just photo slide shows or walk-thru videos that drag you through a property), what's stopping rental property owners (RPOs) from using the new technology to market their properties? 

I found this property, found the owner's contact info and set up the initial tour by myself but feel bad about my agent not being involved.

I may just be your guy (Former PGA golf instructor)!

Depending on your appetite for risk or how throughly you went through the home during your tour, in a multiple offer scenario, the less (or none) the better.

They get a chance to look at all of their prospective areas first hand, tour properties, meet with property management and get answers to their questions and based on if they feel if it's a worthwhile investment they'll elect to move forward.