I would also add on that you should ask them what deals they have closed in the past and ask them for some details on those deals so that you can see what numbers they work with, their level of detail, and if their deals make sense to you, because as you will see in this industry there are a lot of people who think they can make a quick buck and have absolutely no idea about finding a reasonable ARV, repair estimates ballpark, and/or calculate closing/holding/financing fees that buyers will incur.Also, make sure that they actually have the original contract to the house if they're assigning it to you because some people try to wholesale other wholesalers' deals and it's a mess.

But I would borrow 100K at 5% that I knew I could rent for enough that not only would it be paying the principal down on the mortgage a couple hundred bucks every month, but also cash flowing (after all expenses and vacancy, etc.) a couple hundred bucks every month.

I mainly operate around Philadelphia and Bucks County (grew up in Newtown). 

I can get a C area for 40k and B area for 50-60k, so I usually do that And are you happy with having a couple of these homes bringing you 1000 bucks in cash flow monthly?

Recently, my offer was accepted for 5 units in Eastern Milwaukee.

@Adam Horvath I think you're right about the kitchen remodel, the other simple fixes that you can do to get a great bang for your buck is to replace the bathroom fixtures and maybe (if this makes sense for your area) change the paint color to something thats a bit more in demand

You stated the house is in an A area, so you want to make sure to get the most bang for your buck.

Places like Detroit and Milwaukee are cheap, but they come with their challenges. 

Should I go there to invest because my nest egg will reach further, or should I keep networking until I meet people with the big bucks?

maybe join the Texas Apartment Association for a couple hundred bucks which allows you to use their lease. it's pretty comprehensive.