Great questions.... let me take a stab at a few and I'm sure others will chime in and help out...
Being in Singapore, you're going to want to search out and locate a reliable place to purchase your products, maybe that's the AG store? I don't know but you need a reliable resource for quality products.
A good APC and a good plastic, vinyl and rubber dressing will take care of a lot of the inside and outside cleaning that plus a LOT of microfiber towels.
Remember to keep it simple and this includes when talking to customers,
Under promise and over deliver. In other words dont' boast about what your going to do, (talking), show what you can do.
Kind of depends upon your market and any water restrictions you might have to follow. I'll say both pressure washers and foam guns are not "need to have" but more "want to have" again, depending upon your market which includes the volume of cars you're going to be washing each day, the condition of the paint on these cars and the location.
Pressure washers are great for blasting dirt off of anything but you also have to deal with man-handling the pressure washer itself and the water hose and wand hose.
I don't personally use pressure washers a lot and I don't think I would if I were doing production detailing but again, the condition of the cars, (dirt level), and the location and the volume of work would be factors that affect that decision.
I only use the Foam Gun when I wash modern or new cars and I never use it when washing classics, street rods, customs etc. For these I use Waterless Wash.
This is just my opinion, so for what it's worth...
If I were doing production detailing I would be doing the mechanical decontaminating step during the washing process to save a step and some time. Plus tools like the Nanoskin Wash Mitts do out last clay and you can wash them off if you drop them on the ground and when you're doing production detailing you will tend to drop a lot of things as you work fast.
I teach production type car washing in my detailing boot camp classes, here's my most recent write-up that does a pretty good job of showing what to do.
Although for production detailing I would skip the Iron X treatment as this is a premium procedure for higher paying customers and nicer cars. (usually)
The Aggressive Approach to Washing a Car
Thank you for bringing this to the forum...
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