well, ok the cost of the truck..
M35A2
4000 from a dealer
500 for S-280
125 for cold weather 'bra'
1000 for hardtop, windshields
600 for two 11.00x20 18-wheeler tractor steer tires new
3500 for onboard diesel genset
150 for one window A/C units for S-280
700 spent building the other, larger one myself
250 for an 11.00x20 tire new
375 for 5 11.00x20 tires new
120 to build civvy trailer hitch unit
200 paint
125 pyro
100 pyro labor
45 boost gauge
100 flame heater detector kit
200 batteries
40 cab lights
500 large gps
370 for the Nd:YAG laser
$5000 estimated on communications gear incl. (military commercial and ham) cables, batteres, Vanner EQ, switchgear, etc. in the S-280
125 new fluorescent lighting
300 steel spin on filter adapters
300 preluber
750? air o matic steering
550 lock out hubs
==========
????
"M8109"
truck 3750
recovery 500
M109 box 750
lift gate 375
batteries 450
tires 1200
onboard APU, water cooled 2500
hardware for the above 1200
cost of travel and lodging to do the above 1500
transfer case from M939 series 2225
putting it in, about 5100 incl machine work etc, you might do better
Raytheon radar set 550
cab heater 100
///
and it still has a long, long way to go..
bodywork on 109 box
cab a/c
repair of military a/c units for box
switchgear for 120VAC/240VAC, 12VDC, 24VDC, 392AH of AGM batteries
communications gear, not as extreme as above but more powerful and versatile.
fold down bunk
microwave
fridge
small sink (maybe)
crapper and shower (maybe)
small flat panel TV, stereo
fluorescent lighting
LED lighting replacing the ceiling lights
hardware for mounting the applicances
hardware for mounting the electronics
The way I see it , it's no more expensive than owning a decent boat and just as profitable when trading up.