I usually travel solo as well. I usually prefer a place that has something more than a continental breakfast included. I am also extremely budget conscious.
For runDisney events, I have stayed at these hotels:
-Quality Inn & Suites Anaheim Resort (on Manchester, around the bend from HoJo). Recently under renovation. Gives me the vibe of Port Orleans French Quarter or Midnight in the Garden of Good and Evil. Walk time to start line 10-15 minutes. Walk time back post race 20-30 minutes, depending on lines to go through bag check on the Esplanade.
-Tropicana Inn & Suites (pretty much across Harbor Blvd from where the ART & parking lot buses enter the Esplanade). Walk time to start line 7-12 minutes. Walk time back post race 15-25 minutes.
-Quality Inn & Suites Anaheim at the Park (on Katella Ave, just off the southwest corner of California Adventure). They knew how to host runners when I stayed here. They opened the breakfast early and kept it open late (outside the typical 6-10 timeframe). Walk time to start 5-10 minutes (depends where the start line is as it varies from race to race). Walk time back post race 5-10 minutes (No bag check/security!!!!!)
-Ramada Anaheim South (on Harbor, south of the resort. At least a mile.) Walk time to start 20-25 minutes. Walk time back post race 20-25 minutes. I stayed here for the DL half weekend in 2015. I am thankful I was only chEaring and not running as it was a miserable trek to the park, let alone the start line. So much of a crummy walk back that after the first day, I Uber'ed it from the drop off lot the remaining four days I was there.
I am scoping out hotels this week and going to see which one is the best option for me. The ones on Katella are certainly closer to the start and expo. And when you are going back to freshen up after the race, there is no bag check to hold you up. The ones on Harbor are closer to more off site dining options.