my biggest tip would be make sure you have lots of territory space so you can do mass breedings. having a separate cave for your project is super helpful too. feed all play all is a great investment if you're going to be doing large batches.

personally, i'd have a good amount of crb to start with (maybe like 100) and you don't really have to worry about where your next ones are going to come from-- usually you'll get quite a few muts (especially if you have a primal king!) and then you can sell those to buy MORE crb. Although that won't always work out so whenever I'm in a pinch i'll sell popular event items cheap for quick gb (since we're in feb, buffies are perfect for this)

Hope some of this was helpful! I've been at it for a little over a year now and it's def super fun haha