Pressure washer cost $5500. or so.
I suggested to rent one.
It is the most used tool in my shop.

I media blast for sure after steam cleaning. It's almost nice enough to go right over but I would want the new paint on something better like bare metal. Yes it takes very little blasting when it's that clean.
On this car I used coal slage on the bottem and inside and plastic for the body.
Not much media laying on the ground and the car is bare. And I'm 30' from the back porch. That tells you that I didn't blast there long. I have a large towable diesel compressor that provides plenty of air. So it's fast with a large air volume.
In this picture is after I did the outside with plastic, it's mostly white in color. The day before I did the bottem and inside with black colored slage. I cleaned all that up the night before so I could roll my car back into the garage. So there was more than just the white mess blasting the whole car.