I could have got this all wrong of course but....
"Me and a friend are looking into doing an expedition"
I wouldn't call green laning in the uk an expedition.
"but seeing as the vehicles are older (93 & 96) I dont want to disappear too far away, also I would like to keep costs down at the moment as I got an expensive year..."
There's absolutely nothing wrong with a 93 or 96 vehicle for travelling "too far" and if they had done so in the past or researched the subject they would know that many myself included, prefer older engines which are easier to repair...if they go wrong.
If they were not novices, I'm sure they would not be looking to pay someone their hard earned cash to take them laning.
As I say I could be wrong....but I don't think so.