I would be carful about wood burning stoves as the gov is on the verge of banning them,many retail outlets here are lowering prices to get them of the shelves,this of course may be a few years away and i have no idea how there going to police it,bit like halogen light bulbs which were banned...
you dont want a inverter for a laptop,there is a up voltage plug and cable for them which goes into cigy socket taking 12v up to 19v,there on ebay sorry no link.
No bother mixing oils and i use asda which is just top makes rebadged,i change every year or 5000 miles and filter.
Oil only goes of in the engine because of by producks from heat and blow by like acid carbon and wast fuel never mind water.
Oil in cans is ok for years but keep out of sun light.
Its a ex library bus you require to convert,one chap on here has just bought one as in picture, and i have a slightly smaller one with six seats and two double beds ,but could carry 2 extras at a pinch with hammock bed if required.
Yes spare wheel axal stand, bottle jack with a wheel chock,long wheel braker bar, not forgetting a led head torch and summut to kneel on along with floresent coat.
Ten mins to change a wheel or 3/4 hrs for AA to find you if lucky.