Attorney here. When partners give me assignments, they sometimes say, "This is worse than your typical wet basement case." That's when I know it's a really shitty assignment.
And this is because "wet basement" types of cases are inherently very difficult to prove fault and require a stupid amount to litigate given the relatively small amount of damages at issue. They bum those assignments to me so they don't waste any more of their time on a case that's a loser.
In your case, you'll have to pay an attorney to meet with you (might get a free consult), to draft a couple demand letters, to draft and file a complaint, to respond to any defense motions, to draft discovery requests (to get information about what they knew), respond to defendant's discovery requests (so they can get information about you), and ultimately conduct depositions (which take 1-2 hours to prepare for and take maybe 3-4 hours if there's multiple defendants). If this doesn't settle then I bet you run up $10,000-$15,000 in fees quite easily.
And even after doing all of this, it's usually very difficult to prove fault.
TL;DR: you're talking about paying a lawyer a ton of money, and you're very, very, very unlikely to get (a) 100% of your alleged damages and (b) your attorneys' fees.
All that said, I still think you might as well try to get a free consult with a lawyer, but don't be surprised if they aren't interested. If they are interested but want a high retainer fee, then that means they think your case sucks just as much.