$1000 will definitely MORE than cover the cost of housing for 6 total snakes. I have a rack that I paid $300 for that holds 5 levels of 28 qt tubs. I bought babies at an expo, so 28 qt tubs were too big, so I went to Home Depot and bought a bunch of 6 qt tubs with lids to house the babies. I also bought a bunch of 16 qt tubs for when they reach the 500/600 gram mark, and the rack came with 28 qt tubs. You could either purchase one of build one yourself. I would love to build one myself but I'm not confident that I would do a good job.. I'll leave it to the experienced haha.As far as what snakes you want to get, it really is up to you. There's different ways you can go about starting a breeding project.
What do you want to produce? Do you just want to start up a business producing base morphs sell? Do you want to produce some multi-gene morphs? Is there a particular morph you really want to produce a lot of? Not all adult females are 1k+. Adult proven breeder pastels can be $500 - $700. Adult proven breeder NORMALS go for around $100 - $250.
You can buy a backup male in case your mojo doesn't want to go. You could then start looking for a newish morph male to breed to your females. That would probably cost you some money, but I'm sure you'll have enough. Prices for that newish morph that you just bought will decrease, but you'll still probably be able to sell the offspring for a good price, make your money back, or maybe make a profit. It's all up to the odds gods and mother nature lol. Alternately, you can buy another morph male and sell the offspring from that. I would either get an enchi, calico, or a lesser/butter! Females are worth more than males, so I would be hoping for female morphs in those clutches lol. Great examples of each are going to cost more!
Another important factor to consider is the fact that you might not sell all your babies.. Be ready to care for all the babies that hatch out of the egg.. Ball pythons typically have ~6 egg clutches. 6 x 5 females is 30 babies that you would have to take care of.. Answer the questions mentioned above, and maybe we can give you some better feedback!
PS. It took me a long time to write this up because I'm at work.. You probably answered most of my questions already, but I'm posting this anyways.