Yes its doable. FIRPTA requires the International seller to submit 15% withholding tax (of the purchase price) to the IRS. In the event the Seller does not do this, the IRS reserves the right to collect that tax from the owner of the deed (ie. the new owner). Because of this, the IRS requires an ITIN for both the buyer and seller, thus opening up a file with the IRS. This is why many people shy away from it, or even recommend against it. However, if you use a good FIRPTA specialist and a title company that does their job effectively, there should be no issue so long that the FIRPTA tax is submitted properly.
Edit: I am not a tax specialist and buyers should always seek competent advice from a tax expert - not some "Jimmy" from disboards.