I agree with onward, we don't use a curriculum either! We followed the children's interests and facilitated their learning in whatever direction they wanted. This took teens up to the standard to get good A levels/start OU course aged 15.
TBH the vast majority of home educators I know (and I know a hell of a lot) don't use curriculums either, but the are ways around it even if you do want a more structured home ed.
AS onward says, you can buy resources at charity shops, on ebay, at car boots etc.
There are loads of resources free on the web.
Education Otherwise has a deal so you can get a subscription for Learn Premium at a bargain price, THENUK is looking to do the same thing.
There is also a book written by a home educator called 'One to One: A Practical Guide to Home Education aged 0-11' by Gareth Lewis, that would be worth a look at as a basis of a programme about home education.
If you ever do decide to go down this path, I'd suggest reading some of the books on the 'Books about home education' thread and some of the links on the 'Websites about home ed thread' to find good resources.
We drive a very old car, go to home ed camps and gatherings for holidays-and make the most of Sun newspaper holidays deals, 'Travelodge' sales (we have just booked a family room for three nights in Devon for £9 a night), use Megabus to travel down to London to got to all the museums etc
We go to workshops and meetings with the local home ed group-and get things at an educational rate/group discount in term time.I can never believe the cost of taking a family bowling/iceskating in school holidays! We do those sorts of things at a MUCH cheaper price.
We don't have the expense of school uniforms/shoes or the worry of buying expensice brand goods either-that pressure disappeared completely when our children left school.
TBH home ed can be as cheap or as expensive as you choose.
I know of home ed families where mom continues to work and the children are cared for by grandparents/childminders/au pairs during that time. Remember home ed doesn't have to take place during term time, between 9-3
hth