I'm sorta in the same boat as you except for the "side business"...I may do 4-8 cars spring/summer besides taking care of my DD and "somewhat" "Garage Queen".
You can get into some serious cash very quickly, so I hear Ya :xyxthumbs: However, it's often "you get what you pay for" However, However...there are some "Diamonds in the Ruff":
This is what I have and/or will Have:
Foam Gun: Gilmour
Get a Quality Hose or you'll regret it.
Gilmour Hose Nozzle: Rinse, ect ( Get the Quick Disconnects)
DP Extreme and Maxi Suds II
Walmart 5G Buckets (2 bucks/ea I think)
Grit Guards....just pay it

Wheel Woolies...just pay it

Many Spray Bottles with the Grey Chemical-Resistant Spray Heads, everyone carries them.
Interior Cleaner: Inner Clean (Chemical Guys)
Rubber Seals: 1Z Gummi Pflege Stift...I like saying it.
Trim: 1Z Deep Plastic Cleaner
Metal Polish: Optimum
Glass: Stoners
Clay: Nanoskin (Mitt, Sponge)...just pay it.
Surprisingly, the most important item IMHO is:
QUALITY Micro-Fiber Towels!!!!! Anything that is between your Hand and the Paint better be QUALITY or you'll RUE THE DAY....
Eagle Edgeless from the Rag Company for me. However, I'm a MF Towel Addict, so Microfiber Madness (Yellow Fellows (polishes/compounds), Crazy Piles, and Incredimett)...Uber "take out a mortgage" Expensive!!!
I do
alot of Waterless Washes, So...
Megs D114: first ballot Detailing Hall of Fame and CHEAP!! Great as a: Clay Lube, Rinseless, Wheel/Tire Cleaner, IPA Replace, depending on Dilution Ratio.
Spray Wax/Sealant: Meg's D-156....AG has a 2 Gallon Deal: Just Do It!!
Sealant: Menzerna Power Lock.
Wax/Sealant: Just get some Collonite #845 and end it !!!! :dblthumb2:
Polisher: GG 6"
Foam Pads: LC HT's/Meg's/Buff and Shine. All are expensive imho. But this is between your hand and the paint !!! (See: above)
Be patient and have all your items in a wish list/cart and when you see 20% Off "No Exclusions".... FIRE FOR EFFECT, stay low SQUEEZE and Hold Down TRIGGER (Full Auto) and Launch Bullets lol and Bring Down the Rain!!!
Pop on AG once a Day (if possible) and see if they have any "STEALS" like the Pinnacle Souveran @ $31.99 fiasco a few weeks back.
Polishes/Compounds (Remember "between your hand" above, don't skimp here): HD Polish/CarPro Reflect/Optimum Hyper Spray/Shine Supply Classic on and on. Haven't settled just yet on the final 3 in my arsenal.
I'm searching for a quality compound but I won't be needing much.
Review these threads intermittently for product reviews and "Pro-Speak"...you'll be able to tell who these people are

rops: , for little tips and tricks and PM them if you have a specific question; Most are more than willing to help.
Probably forgot some stuff but....hope it helps