We typically buy and hold but it would depend on the numbers for this project, we'd be open to either BRRR or fix and flip so there's a few possibilities.

It also depends if your tenants have good credit they care about.

There are best practices on certain items that provides a guidelines.Commissions are always negotiable like any other services, you can shop around for the best value for money.All depends on the risks that you are willing to take.

Deduct NEW property taxes after you buyDeduct home insurance costsDeduct maintenance percentage, typically 10%Deduct vacancy+tenant nonperformance percentage(we recommend 5% for Class A, 10% Class B, 20% Class C, good luck with Class D)Deduct whatever dollar/percentage of cashflow you wantNow, what you have left over is the amount for debt service.Enter it into a mortgage calculator, with current interest rate for an investment property, to determine your maximum mortgage amount.Divide the mortgage amount by either 75% or 80%, depending on the required down payment percentage - this is your tentative price to offer.If the property needs repairs, you'll want to deduct 110%-120% of the estimated repairs from this amount.Be sure to also research the ARV and make sure it's 10-20% higher than your tentative purchase price.As long as the ARV checks out, this is the purchase price to offer.It is probably significantly below the asking price.

As all the investors know, the Killeen rental market depends heavily on the military PCS cycle and I'm curious if their is anything else impacting the rental market there?

In terms of highest yield it totally depends on your investing thesis.

@Dan PoratI am looking block by block at the household income and agree with D to C depending on exact address.

It can get pretty expensive what would anyone suggest or should I write the lease so that the next tenant depending on time of year should I do not include a specific utility and adjust my rent because of it ? 

Depending on your current rate or if the current loan is short term or long term.

Seller financing can be a valuable tool when used correctly, but its effectiveness depends on how it's structured and implemented.