I'm not sure if this allowed to be asked xD, but which is more important, the cartographer blueprint or the astrologist. Let's say a purple building offered to swap their cartographer for an astrologist? Which print helps you better?

(Also, is expanding your stables a BIG thing, because it says I am about to hit the pet limit of 20 pets or something like that Cx)

The Cartographers Guild is useful only if you regularly catch Wild Pets. I don't, so I haven't built one yet. The Astrologist gives you a better chance of finding a certain item in explore, so I find it more useful. It really depends on your own preference. 

I would say that expanding your stable is definitely important. As you continue to play and accumulate new pets, 20 spaces just isn't enough for breeding projects and collections and such. If it's enough for you, though, don't feel like you have to expand.

I mean, is expanding your stables a really big deal? Like lots of coins required, having to wait super long, having to spend MONTHS to save up?

And thanks!

Not particularly, especially if you're doing a lot of island exploring with your pets. A level 2 stable only requires 100 of clay, stone, and wood each along with 5,000 coins. The coin requirement goes down if you use multiple copies of the scheme too, if you're a bit low on money. 

Materials also aren't that difficult to find. Again, lots of island exploring generally takes care of that. Using golems once you get them is also pretty useful. And if you just can't scrounge up the materials, check out the threads in Contest/Giveaways or Item Sale forums. There's quite a few veteran players who will give free things to help out new players.

Okay thanks! (I'm not as much of a new player as I joined last year, lost the password and recently found it.)