Cheers, not going to jump into a decision like this bit def need to get a ride in some others. It seems like the general consensus is leave her as she is
I thought about lowering mine when I first got it but after bending my front number plate on a few camp sites at standard height I came to my senses.
I think the weedeater beam was about £500 and shocks about £100 each + fitting Then you have sort the back end I went with creative adjustable spring plates about £200 and spaxs £200 £1600+?
Mines lower and i love it that way. Ride is great, no problem loaded up for camping, gets in and out of fields no problem too, handles better than it did before too. To answer the OP's original question though, is it a large / expensive job? To do it right then yes it is.
i also destroyed the front number plate - but I went for the raising of the plate option and kept the van lowered For the OP - mine has a Foxy beam adjuster up front and is dropped one outer + one inner (the other way) on the rear. Gives a slightly more attractive stance but still deals with most bumps with only mild arch rub! I had the beam off for repairs so made fitting the adjuster much more straight forward (cut myself and got the local garage to weld it in for a tenner). Some people don't like the fact that this adjuster only operates on one beam but it hasnt broke on me yet....
I've got a lowered beam welded not adjustable, so to raise the front to stock I'm going to have to change the front beam or have adjusters welded in,horse shoe plates on the rear, which I'm going to change to adjustable spring plates in the spring, to combat the front tyres hitting the arches I've had to fit lower profile tyres
Mines about 3'' drop with a creative engineering beam and shorter shocks then the rear plates turned to match the ride is ok but can be a bit bouncy. Any lower and you start getting problems with rubbing I fitted standard wheels and tyres as the main reason for lowering was for the wheels to fill the arches I have never had a problem getting in or off a campsite
Cut and twist front 100mm, lowered to match at rear. Then raised 25mm recently on coilover shocks to stiffen the reduced travel left. Done in 2005 by a previous owner it cost £550 for basic lowering. And it cost me about £500 messing about with different shock absorbers until I found the combination that did not bang and rub.. If the bus is new to you spend the money on fuel hoses and checking the engine out rather than cosmetics. A set of new bushes in the steering and track rods and ball joints is also helpful. A blown engine is far more distressing than blowing around a bit. Which lowering does not necessarily stop. Just enjoy it!