Mine took me about 9 months to finish. Some parts come from all of the world adding to the build time. In reality, if I had ALL parts on hand, and I didn't have any issue, I might've been able to finish within 3 weeks (full time). That's basically impossible since I'm building a prototype machine. Manufacturers should be able to minimize this time, by reproducing the existing design.
I spent about 5.5k on mine.
The RGB light bar above the PF monitor took a $#!T load of time.
Imagine going back and fourth to every hardware store with 20 miles looking for the perfect bar. Once bought, measuring out the 7 locations for the RGB's, marking them, then drilling 42 wire holes in a bar.
Follow that up with using a grinder to cut it to length and make a diamond plate pattern on it. Once that's done epoxy the RGB's and wait for them to dry. Now, solder 42 wires onto those chips. Then you gotta solder 21 resistors, heat shrink them, add the bulb covers, etc...
All that most people see is "Bling" 
, but I remember the pain 
Expect to have a "work area" that will start to consume a larger and larger area, until you finish.
If I had all parts available, with an assembly line - wiring was loomed (like Sterns factory), then it might seem like a piece of cake.
IMO, you can't find one as nice as mine commercially. More directly, you can't buy a real cab commercially(45 degree mitered lock bit joints), let along a later model Widebody with all the accessories.
The commercial places have there top of the line at around $7,500 and they are a business. You can't expect them to pay for an assembly line, warehouse or retail space to sell machines for a couple hundred bucks....
You reap what you sow:
Waiting for wood filler to dry will take a day, then paint to dry will take a day. I could go on and on - but instead I'll spam ya with a long picture vid going over my previous build utilizing a F-14 cab.
