The labour cost all depends on the modders experience, skills and hourly rate which can differ quite a bit I guess - so I advice you to do some research and contact them for a quotation. Regarding the parts cost, here's a rough guide:
Gen cown/ tube ($100-150 - for a 703)
Gen bezel insert ($100 and up*)
Gen T39 crystal ($100-150)
Slow beat ETA 2846 movement ($80-120 - in good running condition)
TC hand set ($50 - I think)
*Price depending on condition and type (service/ lumi, fat font, new/ naturally faded/ ghost etc.)