Tying up with a rental delivery is a neat deal, if the economics work out for both parties. That's a side issue.
Indiana is probably 4000 miles from anchorage on the route and in 17 days you will average 250 miles per day including the days spent on the bus in Denali, day fishing for salmon on the Kenai, day fishing for halibute at Homer, afternoon at Liard hot spring, posting your sign at Watson lake, checkout day at ia, checkin day at anchorage, side trip to Dawson, side trip to Valdez ,side trip to Skagway, beaver creek at 30 mph.
If the delivery works for you do it, but drive like hell to Liard hot springs and stay on schedule from there.
We are still not finished with our second trip to Alaska. 95 day since setting out. You gotta go. It's the trip of a life time. With limited time I would drop the northern part of ak, chicken Fairbanks and Denali. Denali is visible not a large part of the time.
Pops