Way more, if you're talking about literally the A-1's R-3350 18 cyl. radial engine, v comparatively very low maintenance modern turboprop engines as on a Pucara, not to mention a single engine turbine plane. At today's labor costs in a first world AF, maintaining the A-1's engine is out of the question, plus again gasoline is now a special item in military logistics (though Predator A does have a simple Rotax gasoline engine, the Army's Warrior version uses a diesel engine for just the logistical reasons mentioned; the larger Predator B/Reaper are turbine). The question should probably assume you re-engine the A-1 with a turbine; then I still don't see a compelling reason for such a plane, but actually bringing back the A-1 engine and all is just not realistic at all, IMO.
Joe