Hotels near Mount Rushmore?

Going back there this summer for a couple days. Stayed in Custer the 1st time almost 8 yrs ago (I know, long time), at the Best Western there. Hoping to stay in Custer again, but at different hotel. Will be staying 2 nights, & on a budget. Any suggestions & recommendations. If no hotels in Custer, looking at Hot Springs & possibly Keystone.