I am no expert, but have stayed in a 2 man tent with my partner for 5 nights and although cosy, would not do it again.I would recommend a 4 man tent. And as for air beds, The ones I have used were hopeless. You can buy roll upmats to sleep on with are compact for travelling and fab...depending on how long u are going for.Definitely get a mini camping stove, even if just one ring.It was a god send for me, just to be able to have a coffee or tea in the mornings......Camping is meant to be fun, so u don't need luxuries.Just the basics, mates, sleping bags, mini stove, a lamp/light and you shall be fine .I personally buy all my camping gear from Argos as they have packages with the contents you need,and the seperate items are cheaper than found at campin retailers. You could also try www.gumtree.com for your area.I have noticed , many people are giving away camping items in the freebies section and if not are often selling them...I hope this was some kind of help...Have a lovely time x