The project is approaching $400. Just to dispel a myth, for $400, I could set myself up with all the painting and modeling supplies I need ($200) and buy a modest space marine army, maybe a 40K starter set and a battleforce box with a few more models to fill it out. Magic players shy away from miniature games because they perceive them to be expensive. It's not any more expensive than Magic, you just can't buy miniature games in $3.99 increments.

I'll get a better sense of deficiencies and balance once I've played some games. I also need to come up with a sideboard. Sideboards allow you to swap in up to fifteen cards between rounds. My understanding is that these are usually specialty cards to counter opponent decks that are potent against you. You might keep some good "anti-white" cards on the side. Thoughts on must have side deck cards?
Here's my deck today. I'm wondering if I have too many monsters.
Vampire Deck (2010, Zendikar, Worldwake)
Land (22)
Swamps (20)
Piranha Marsh (2)
Creatures (22)
Kalitas, Bloodchief of Ghet (1)
Malakir Bloodwitch (3)
Vampire Nocturnus (2)
Bloodghast (4)
Gatekeeper of Malakir (4)
Child of Night (4)
Vampire Lacerator (4)
Spells (16)
Tendrils of Corruption (4)
Doom Blade (4)
Disfigure (4)
Duress (4)