It's probably worth the $150-200 it cost for consultation with a legitimate, licensed, tax specialist... the biggest mistake everybody makes with taxes is they wait until tax time, "I'll get my taxes done this year by a CPA firm." By then it's already too late, because the actions you'd have to take / decisions you'd have to make to reduce your tax burden have already come and gone.
If it turns out there's not much you can do to reduce your tax burden, then you'll be out $200... but you'll also be able to stop spinning your wheels over it.
And the real guarantee, if they're wrong and it costs you money, they're liable through tort law. The same cannot be said for many others offering tax advice.