@Patrick Cruse it all depends on your contractors and whether or not they treat you fairly. If you're planning on holding onto this forever then it may make sense to go ahead and invest more than $15,000 into it because your returns are going to increase exponentially over time.
In the midwest turnkey companies typically pay $15 per square foot for heavy rehab. I wouldn't call this a heavy rehab. The kicker here is turnkey companies have access to contractors and materials cheaper than you and I do.
However, it may take you a little more time, but if you ask around for contractor recommendations in your network, and then hire each job individually I think you'll save the most money that way rather than hiring a GC. That is what I did for my flip in Brownsburg. If time is an issue then spend the extra money and hire a GC. It really all depends on the time you have to commit to managing the contractors and the work. For some investors it makes more sense for them to spend the extra money and hire a project manager and GC, for others they manage everything themselves.
You don't need granite in this type of home. There are other materials that are extremely durable just like granite, but at a much lower cost.
Some people will say yes this can be done for less than $15,000, while others will say no. The best thing to do is to come up with worse case scenario. Say something blows up and now it's $20,000 in repairs. You're still not losing money, and you've learned a lot along the way, you have a cash flowing investment, and you've built relationships that you can leverage on future deals.