One thing to consider for those who plan on taking ore to produce armor and weapons: The game now requires multiple bars for each piece of armor. So if I'm doing the math right, a set of armor (helm, mail shirt, gauntlets, leggings and high boots) would require 16 bars of whatever metal you choose, not just 5 like it used to. And that's skipping a breastplate, which is another 9 bars!
If you want steel, you'll need as much flux as well. If you are embarking in a wooded area, you can make charcoal, but if not, you need to bring enough bituminous coal (plus one wood to start it) to produce twice as many bars of coke as you want steel.
16 hematite x 24 P = 384 P
16 marble x 6 P = 96 P
1 wood x 3 P + 16 bituminous coal x 3P = 51 P
Total: 480 P if trees are available, or 531 P without trees
That's a lot cheaper than starting with steel armor, but you still aren't going to equip many soldiers with what you can bring in the embark. Equip 2 dwarves (assuming trees) and you only have 314 point left. That's not even enough to max out your dwarves' skills.
Bronze looks a lot nicer, though. It's ores are cheaper, it doesn't need flux, and you can make two bars with one fuel.
8 malachite x 6 P = 48 P
8 cassiterite x 6 P = 48 P
1 wood x 3 P + 4 bituminous coal x 3 P = 15 P
Total: 96 P with trees, 111 P without trees.
Now that's a lot more practical, one fifth the price. Heck, you could equip all 7 dwarves in full bronze armor and still have 497 P left over. And bronze is very likely good enough for anything you will face in the first year or so. If it's not, then it's likely that steel wouldn't be either.
Someone please check my math and let me know if I made any mistakes in how many resources are needed or how much it costs.

Edit: For those who want to take live animals and butcher them after you arrive instead of carrying meat, I just calculated how much food you get per embark point for the various animals typically available at embark:
| Animal | Food | Cost | Food/Cost |
| Turkey | 19 | 6 | 3.17 |
| Blue Peafowl | 17 | 6 | 2.83 |
| Goose | 17 | 6 | 2.83 |
| Chicken | 13 | 6 | 2.17 |
| Dog | 26 | 16 | 1.63 |
| Goat | 27 | 26 | 1.04 |
| Cat | 7 | 11 | 0.64 |
| Pig | 29 | 51 | 0.57 |
| Sheep | 27 | 51 | 0.53 |
| Water Buffalo | 51 | 101 | 0.50 |
| Yak | 38 | 101 | 0.38 |
| Alpaca | 35 | 101 | 0.35 |
| Llama | 35 | 101 | 0.35 |
| Mule | 34 | 101 | 0.34 |
| Horse | 31 | 101 | 0.31 |
| Donkey | 20 | 101 | 0.30 |
| Reindeer | 28 | 101 | 0.28 |
| Cow | 35 | 151 | 0.23 |
| One-humped Camel | 50 | 251 | 0.20 |
| Two-humped Camel | 43 | 251 | 0.17 |
| Duck | 1 | 6 | 0.17 |
| Cavy | 0 | 2 | 0.00 |
| Rabbit | 0 | 2 | 0.00 |
| Guineafowl | 0 | 2 | 0.00 |
The food values were obtained from the wiki, by adding up all the food items in the butchering returns box. Where there was a range, I too the average of the high and low value. I suspect some of those are not entirely accurate.
Note that you can buy meat at 0.50 food per point, so many of the animals are not worth it. Although you do also get bones and skin, which aren't factored into the above table. It also doesn't factor in eggs, which would make the birds even better if you let each one lay a clutch of eggs before butchering it. So it looks like Turkeys are the best animal to take on an embark for quick conversion to food. It's also nice to keep a few hens in the long term for continued egg production.
So instead of starting with the default 30 meat costing 60 points, you can spend those points on 10 turkey hens and get 90 meat, 90 fat and 10 intestines (my favorite!). Plus a hundred or so eggs if you make a nest box and give the birds time to use it.
Or you could just spend 12 points on 2 turkeys and get 18 meat, 18 fat and 2 intestines so you get a little more food than the default for a lot less.
But doing either means you can't get 30 free barrels by taking 30 different types of meat. Maybe a few turkeys and a few single units of different meats to get some barrels?