The other advice below is good. However, bluntly, no. You can renegotiate and if the landlord is amendable, then you can leave on the conditions you mutually agree to. But break your lease to buy your first home? No way. And there's no special dispensation for "first home," versus second or third. And there's no special law in Pennsylvania (that I know of, though I'm not a lawyer) that excludes lease breakers who are purchasing first homes.
And consider this: You break your lease, and your landlord has every right to report you to credit bureaus, sue you for the remainder of your lease payments, etc. In addition to making your life miserable, those actions might also significantly lower your credit score. Hey, in today's market, if I were a lender I wouldn't want to lend to someone who had deliberately defaulted on a lease.