When choosing a brokerage the main thing to remember is YOU are interviewing THEM.

Does anyone have any other contractors in Kerrville for me to interview?

You made the decision to reach out and interview property managers, so it sounds like it's time to make the switch. 

I'm looking to invest in my first deal as an LP and upon interviewing GP's each makes their deal sound as if it's the best deal ever.

Depending on how you plan to manage your investments, you could also establish a relationship with a property management company after you've done some interviews and utilize their preferred network of contractors if you've deemed it to be a good fit overall.

This is a two-way interview, so have a short list of questions to ask the mentor (What books do you recommend I read to gain a better understanding?

Treating it almost as an interview process, I think reaching out to old landlords and work mangers is just as important as a good credit score.

I would interview agents that know the area and the current market conditions in that area...sounds like you are overpriced. 

Regardless of how you find them, try to interview at least three managers.1.

I'm not a fan of the HGTV type shows, but watch the ones with the younger agents...some of them It is 100% commission work...so have some savings....some say 6 months of savings and that's probably a big goal.As you interview brokers....ask them about these concerns.....ask them what their opinions are to overcome them....ask them how to generate immediate income?