Research (planning) and the actual execution of the practice are two entirely different things, as myself personally is finding out.
I myself look at some of the more exotic finches and drool with anticipation, all I have to do is save some dollars then go out the back and build the facilities required. Just sounds so easy, whats stopping me is wanting to be successfull with each species I keep and "plan" to have minimal setbacks/disappointments as possible.
I'll give you an idea of what my personal plan is with keeping birds are in a nutshell.
Year 1. Bought my house, came with an aviary threw some zebs in there. They bred. Yippee
Bought a pair of gouldians because they are a really nice looking bird.
They lasted nearly 12 months, no breeding and the cold got to em. (Was told not to keep em by a pet store as they all die during winter.)
Last year
Did a heap of research and planned appropriately, got rid of the zebras and restocked on gouldians,
missed out on the breeding season.
This year
They are breeding, woo! And learning heaps about it, and some things cant be explained online or in a book, as they are your birds and they act different to everyone elses. Built an extra aviary so once this breeding season finishes they can be separated into single sex flights. Built cabinets for next years breeding.
Next year
Improve on my results from last year with fledglings, more accurate record keeping. And if things go well I'll have a large aviary or aviary block setup so i can expand on getting some parrot finches. Will also look at trying cordons to see what the demands are like with the introduction of having to feed live food. Also probably have a play with some setups for supplying my own live food. Breeding my own gents and/or mealworms.
Year After
If all goes well, ill say id be looking at improving my breeding with cordons, maybe look at another species with live food demands and another seed eater (depending on how I build aviaries) Maybe have a play with more mutations of the gouldians. Try out blues maybe.
Year After that.
Who knows ? expand on the range of birds i have, build more aviaries, buy a larger block of land
I feel once I am happy with live food feeding and providing the right environment for my birds and having the facilities I need to be able to provide them with this environment, especially if things go wrong. I will start moving to more exotic birds, I would love to keep crimsons and the likes of other expensive birds, and I could go and build an aviary out the back round some up and see how they go. But I know I am throwing myself in the deep end and probably running the birds at risk and not giving them the best environment that I could be capable of giving.
After that then, look at keeping exotic birds together, as I'm sure my house will be surrounded by mesh aviaries and will have the infrastructure available to be a bit trial and error.
Important thing is.
One step at a time.