Hey Drifter!
Welcome to LAX. It's been a while since I've been there.
The Hacienda is located south of LAX. The In & Out Burger is north of LAX. Both are on Sepulveda. It's too long a distance to walk. There is frequent bus service along Sepulveda, but I'm not certain of the cost. Sorry. The Hacienda use to run a courtesy bus to LAX (don't know if they still do). If they still do, it's not a far walk from Terminal One, perhaps 20-30 minutes. And, you get to walk along Sepulveda and the edge of 24R/L for departures and VERY low arrivals. It's a safe area during the day Don't forget to have a double cheeseburger and a shake for me!
Another area for you to look for, is along the Imperial Highway, about a block from your hotel. Walk that towards the beach, and you'll get some nice views. I'd plan an afternoon at the beach. Some great views of departures from 25R/L.
Have a great time. If I can offer more advice, let me know.
Jack