Alfred, welcome. As Bert said, some of answers you're looking for are already on the forum. However I have spent many, many hours searching & surfing the same sort of info as we're also planning to move to Bali in a couple of years time. I understand that it is hard work trying to find out about things from thousands of miles away. So will try & answer some of your questions based on my own research:-
1. Will depend how you live. Some on this forum quoted $3000/month. If you send kids to one of the private schools instead of international I'm sure it would cost less than that.
2. Sanur is well known as expat community, quite expensive. We have budgeted at least $800/month for ourselves, wherever we'll end up living, though Canggu is looking favourite at the moment.
3. I have a 4 yr old who will be about 6 when we do move there, so have been in touch with a few schools there. BALI INTERNATIONAL SCHOOL - USD4500 – 10000 (depends on age up to 16), SANUR INDEPENDENT SCHOOL - US$2,600 (up to 11), CANGGU COMMUNITY - $5000 (Years 1-6) & $6000 (Yr 7). Prices are per annum of course and they are just tuition fees. Other fees are applied: i.e yearly levies
4. Visa - covered many times on this forum before
5. Possible with KITAS - please search forum
6. As no 5
7. Many people have had different views on this. Starting a business anywhere is not easy, especially somewhere you're not familiar with. You need to get to know the place & people first before making this sort of decision. As for taxes, well..... many would say,"what's that?"
8. Taxes - please search forum
9. My answer at no 7 applies to this as well
10. I know there are a few of them. (Bert, are you Dutch?)
11. Bert has answered this
12. Answered by Bert
13. Search forum
14. I believe the going rates around Rp500.000 per month + food + assistance with medical bills when necessary + other bits & pieces
OK, hope this is useful. However don't quote me on any of them as I only researched them from thousands of miles too!
Anyway, maybe we'll see you in Bali someday! Good luck!
Greetings from the wet & cold but surprisingly comfortable England.
Irma