We had no choice but to home educate our three children, as the schools simply did not cater for their SEN, and they were very unhappy.
However it soon became our lifestyle choice!

We home educated three children from the ages 13, 11 and 8 right through their teenage years.
When we first deregistered we tried everyting going with our local HE groups, and we mostly get those at educational rates, but some things are more expensive than others and with three children, costs soon mount up.
However we encouraged the children to decide on their priorities, they knew the set up in our house and our finacial situation.......we were on a very limited budget.
It hasn't meant an end to their social lives at all, it just meant we had to budget carefully and make choices.
We have always gone to home ed camps and gatherings, so they became our holidays and I slowly built up the things we needed for camping.
We use Travelodge sales and sun newspaper holidays for other trips.
We used Megabus to London for £1 each way and became very canny at looking out for bargains!
The home ed community has always been helpful in pointing out bargains and ways to do things cheaply (99% of home educators I know are on a limited budget!)
Shopping on a budget was part of maths in the real world in our house!
We no longer have a new car...or even a nearly new car. I drive a very old car and just replace it (with another old banger) when it costs too much to repair.
We used charity shops, ebay, amazon second hand and freecycle for our educational supplies.
Family gave the kids money for presents.
We don't heat the house in the day, they wore lots of layers and we were out a hell of a lot.
Cooking from scratch is cheaper than buying decent ready made, and is part of chemistry and nutrional studies in real life!
the of course you can take out the costs of school.
All that pressure to have clothes/trainers/sports kit with a label, literally disappeared as we walked away from school
The school uniformas alone used to cost me a fortune when they were in school. Then there were travelling costs, cost of trips, requests for charity events etc etc.
We either used the OU for qualifications instead of GCSE/A levels, or had one child who went into college post 16 and did them for free. (our experience would suggest the OU is by far the better option) OU takes the childs income into consideration when looking at funding.
In essence, I'd say that HE costs as much as you are willing to spend.
For us the biggest factor was that I gave up my career to do it and took part time lower paid work. But for us the pay off has been worth it a million times over.
When compared to unhappy children in school every day, give me broke and happy any time!