I own (and in the past have bred) a pair of Indian fantails and know a breeder who that's their main bird. They are sweet birds, in my experience very mild-mannered. I think they would make good companions if you have the space! My birds are strictly outdoors so I can't really speak to how dusty they are.
I will say, breeding them is not easy!!
If you are serious about breeding them, it is extremely important to start with really high-quality birds. The size of the tail and muffs can get quite large and I've seen many breeders push them into unethical areas. Find breeders who opt for slippers instead and who keep tails on the small side.
They also frequently have fertility issues, not from their internal anatomy, but from their tails getting in the way. The solution most breeders will tell you is to snip their tail short, which I am not a fan of.
Once you have a successful hatch, I have found the babies to be much more delicate than any of my other breeds (giant runts, utility kings, and OGO), and the parents struggle occasionally. I think their tails can make it difficult for them to move around in the nest sometimes, and that would be worsened by larger tails and muffs. The breeder I know has also had a couple issues with parents stepping on and abandoning babies, not frequently by any means, but it does happen. This and their fertility issues are the reasons that I don't breed them anymore.
As they grow up, you have to monitor their tail growth really carefully. If not they can easily end up with their tail falling in the wrong position. Too far back, too far forward, or to one side. This is correctable when young, but not so much into adulthood.
They are not the best flyers, and in my experience prefer to hang out on the ground to about 3ft up. This means that you need a lot of room for low nesting boxes and perches. They can fly, its just not as easy for them as other breeds because of their size and tail. This also means that their feet feathers go through a lot of wear and tear (another reason that you really don't want them to have big muffs).
I do love the breed, but I can't say I recommend them as a breeding project necessarily. The only people that I think should be breeding them are people who already have several years of experience breeding other breeds, who have a lot of space, and who are very patient. While those apply to all breeders in some manner, they are especially true for raising Indian fantails.
