@ Smash

The best I got is 4 Vampires per Coffin so 12 for 3 Coffins. If you are lucky, you may get more from sarcophagus.

http://forum.1cpublishing.eu/showthread.php?t=5516

see also
anyway here is detailed explanation of infinite money.
I prefer this method above the friendly gremlin thing.

Use what units u like but u need these 2 at least:
bone dragon: Not full stacked or let them kill ur full stack and let 1 or 2 alive
dryad/royal thorn or any thorns for spawning and respawning.
marauder

Enemy need a non retaliation army or ranged.

Play the battle the usual way and leave small stack alive and if it' s a non retaliation trap him so u have all the space in the middle. Use the dryads/thorn and spawn respawn to set it up. Cast magic spring several times and make calculations that they die in 3 attacks use the bone dragon' s poison cloud to attack ur own units. Rob the corpse from the ones u kill with bone dragon and the ones that die vs the sole surviver.

If u prefer poison cloud to get magic u can do it till turn 40 then rage stops flowing in.

I got 3 millions with this and the wasted it all at the dwarf to buy runes the rune prices raises like pancakes after every one brought.

Around 40 (and hundreds of skeleton archers)

I think there is another place to find them as well. It must be, since I am at the islands of freedom and have 111 of them right now. I think it was a shipwright or some place in the south.

Actually you can only get a maximum 6 Skeleton Archers per coffins. The rest is more likely from gravedigging.

Depending on your game, you can end up with 100+ Skeleton Archers + something else free of charge just by hitting everything in the cementary in Marshan Swamp. There is one time I get a whopping 33 Vampires from 3 separate Sacrophagus, not to mention an additional 12 from 3 carved coffins.

I'm not sure I understand this one. I usually aquire this but not sure how it breaks the monetary system...

You can buy undead troops from the furious paladin after you kill him. And you can also buy Skeleton Archers from the necropolis in Marshan swamp before conquering it. That should be enough for a killing undead army.

As far as I know, there is no way to get necromancers early on, however. :(

Those are random, Rinah. I got zombies and vampires (I think) from the Enemen castle.

@Rinah

If you really want necromancers fast, well there is one way to play the game (not cheat) so that you could have accessed this particular units early on. It may spoil the fun though.

@ jake

It's not rocket science, you just need an item to suppress/upgrade and lots of patience/mana.

Split your marauders into 2 seperate stacks. Beat all the nasty gremlins and leave 1 friendly gremlin tower intact. Set up some thorns to recycle mana and just kill the new units and search them. If you are lower level then cast gift and go again. If you have the reaper then obviously timeback can be used.

Ok. Seems like it would take a painfully long time ...