I can't speak to your options in the Indianapolis area, but here in SE PA the cost of transport of a single tree worth of log would overshadow the value of the sawed lumber. If you have a specific purpose, like building a wood shed, or making a great looking bench, and, if you own a loader and have access to a trailer for free. Then you will need a saw mill that will take one log (or two depending on your tree), you will not likely make out financially. Add to that the drying time for lumber, especially if you don't intend to get it kiln dried, and you are fighting an uphill battle.
And, FWIW, sawmills around here just don't want the risk of imbedded metal in a single tree from someone's lawn, or even field where it might have at one time been used as a fence post, or a target holder, or a resting place for a cloths line prop or other tool.
Now if the tree has some sentimental value, like your great grandfather planted it before he went off to WWI, and if you have access to a portable mill, and you want a memorial bench -> Give it a rip (literally). Give this quick blog a read:
http://www.woodworkingnetwork.com/w...tom-bernie-bottens/The-Big-Log-246356751.html