That price is not out of reason, but not sure i would invest 6K in an FP1 for a job shop.....Have no idea of the sort of work you are getting, but that machine has a limited work
envelope, and limited spindle speed . Working both horizontal and vertical on the same platform is a nice thing and opens the door for extended work and setup possibilities.....
That machine is best suited for work requiring a sensitive touch...while it is capable of making sizeable cuts, its best face is in its nice light "feel" that makes close work a pleasure.
Doing tooling, jigs and fixtures, one-off's and the like this is the realm of the FP1, where slabbing 1/2" off 100 pieces of some 4142 is really not.
Value here for you i think would hinge on the presence of good tool holding tooling...Being the machine uses Morse #4 taper spindles and if stock, has a metric buttress threaded drawbar, it is
important to have a full compliment of collets , milling holders and arbors ....and if you expect to do any horizontal milling appropriate arbors with overarm and outboard bearing would be needed.
All available from Germany, but will increase the running cost of the machine....
In a job shop you need to have a machine that is ready to go and able to run parts without jimmy-jacking about on wanky tool holding or part fixturing....
Also be advised that the tables have metric "T" slots and your current hold downs will not work....so look for clamps and the like in his tooling.
The Morse spindles have their following (not me) and folks here make fine parts using that system....It would not be my first choice. At 6K if you are set on having a Deckel...its not a bad deal, But at
that money you are getting into the range where something newer and more useable for a job shop might be a better call....(have bought CNC Deckels in this price range, but that's another subject)
The accessories are important only if they fill a need for your shop. For hobbyist users, inventors, and model makers accessories become a need...wanting to tool their machines to cover any potential work or project.
The job shop is different. You know your work range and what customers you can expect, and accessories while nice,only become a plus if they help you cover or expand to your customer requirements...and
make a proffit.
Cheers Ross