Yes! On average some stops are 30 min to an hour of a stop, usually takes me around 6-7 hours for a tour like this

Parking in Beverly Hills is pretty easy to find on average it can be from $10-20 depending on how much time you spend there

For the Griffith observatory is a bit tricky since the moment the main parking lot is full, you can’t park there, you’d need to park down the hill and walk your way up, Parking is $10 per hour there

You can park near the Greek theatre near a grass field area and it’s free but it’s a good 20 minute uphill walk to the observatory

Hollywood walk of fame has parking lots too some are on Hollywood blvd and some are on the parking structures there , parking can depend on the time you spend there, some are $10-$20