An LPG service on a three quarter engine will consider of 2 jubilee clips, a visual check, and plugging in a laptop... so I couldn't possibly charge more than a cuppa tea, seeing as I'd be passing anyway 
you say that but id end up ensuring i rope you into the other bits lol i have a list.................
LPG Service, (your defo doing this

)
cam cover gasket
breather clean ( bit rusty been a while since i have done this, may need guidence to refresh ones memory lol)
engine oil and filter
fuel filter
air filter
sparks
gearbox fluid change
brake fliud change. ( would you believe i have never done this before on a miggy

)
key fob battery ( one key is dead )
wheel blance and track ( she was very bouncy on the way home and shes pulling slightly to the left)
ABS light is on too looks like they never had it fixed
she needs a complete going over ( would like you to do a visual on her and tell me what to change replace etc pleassssseeee)
i need her mechanically sound before i sell my disco as she will be used to travel between my MQ (somerset) and NEW home (sleaford, lincs)

And as i have just brought a new house the pennies are a little tight too

non urgent jobs are paint work
inside clean ( started tonight youd be shocked at the state of the inside)
IPHONE jack from the radio ( need to look into this not sure weather to change the radio or see if there is a manufactured cable out there)