We have lots of little things on the go - quite diverse too: luckily we have a range of skills and are adaptable.
To put money in the pot: I do the Music stuff, English tutoring, dog walking, a bit of writing, hairdressing and am currently experimenting with potions for skin. I have a friend who owns a spa in Bali and will likely use my concoctions if they work as planned. I am looking at doing pamper parties- where I go to someone's home and cut and colour hair and use my secret skin potions for a set fee per person. With 4 or more people the host will get free treatment. Not quite ready to sail with that yet as I want to be certain of all the products first.
I am also a hypnotherapist but haven't banded that about too much in Indonesia as the people here are very wary of such things. If there was a market for it I would be most happy. I love hypnotherapy sessions and ftr I am not a stage hypnotist (& not sure that I would want to be one). I am more interested in helping people- & I have done past life regression therapy too - fascinating.
The hubby works with wood - he made all my kitchen cabinets from recycled wood. He made my huge desk from recycled wood. He makes chicken houses and aviaries.
His "day job" is in the building industry with his family, where he is a painter and finisher, his 2 passions are carving and polishing stones and music, music is his other proper job & he gigs regularly. He is currently making me some window shutters- to keep the sun off me in my office.
I tell him he should commission his stone carving work (mainly local black opal) - I am teaching him how to use the computer so that he can sell online.
He is just starting out on a project with his brother breeding lovebirds. Once that gets up and running the aim is to ring all our birds and have a certificate with them showing all the relevant details etc. (much like a dog's pedigree papers). Personally I love cockatiels, who knows we might add those too.
The one thing that we fully intend to pursue is building / renovating property.
Tour guiding: deffo, if someone wishes to come to Bandung and be driven around some of the
off the beaten track places, fine by me, happy to do such things. They have to cover the cost of vehicle hire- or be happy to jump on the back of the bike. & they will be expected to buy lunch/dinner & pay a little something into the pot, i suppose a tip based thing, rather than a priced venture

and they must not be a whinger or I might drop em in a volcano

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As a proper business- I doubt I could make it work without a large investment in a vehicle/marketing- I would rather buy land than cars.
Food business- we have a lovely view of the city from our roof terrace but are not on a main road- so I can only assume a very small exclusive dining club would work financially- 4 tables maximum, with high prices- I am not into artsy-fartsy food though- think rustic tasty and filling- leek and potato soup, stew, meat pie, fish pie, beef-burgers, Yorkshire puddings, homemade bread. That kind of stuff.
Desserts - well lemons feature a lot from our tree- so lemon meringue pie, lemon sorbet etc. Treacle sponge and custard always a fave here too.
To be honest, I like all the diversity and I have another plan up my sleeve too- but still not too sure about it- and it would deffo need an investor and a computery person... and it could turn over a small fortune, I have been working on it for over 2 years.
Some have said to me - choose one area and focus on that work- but I don't want to and if I was not kept stimulated with all the ideas I would be bored rigid.
My phone book reads like a who's who- my contacts are extensive and diverse (yesterday I was chatting with an ex governor, a bupati & a chief medical officer).
At some point everything will come together- but just now I guess, I am still laying the foundations.
BUT I repeat again- this thread wasn't really intended to target ideas for me alone.
I hoped it would help all those spouse sponsored WNAs on the ITAS/ITAP.