I agree with Adam and UnderneathTheRadar.
The Aerostar is awesome. Nothing comes close to it in terms of performance, handling...
In terms of the electric A/C. There is an optional mechanical A/C which I have installed. So when I have everything running, including all lights, hot props, windshield plate and the A/C... I consume 40 amps. (I was trying to load up the alternator to break in a new one). Normally, I use between 10-15amps with the A/C running.
For those who recommend the Baron, Seneca... The Aerostar handles single engine emergencies significantly better. The engines are closer to the airframe reducing asymmetric thrust, less rudder required. I can out climb most Bonanza, Cirrus, Cessna singles when I have an engine shutdown. Even with the extra gross weight increase I have giving me a useful load of 2450lbs and a MTOW of 6850 I will climb at 350ft a minute on one engine. If flying at half loads, I have had climb rates on a single engine practice over 1000ft per minute.
Here is where the Aerostar will bite you, it uses the same airfoil family as a Lear jet. This gives it incredible high speed cruise, handling, low drag... what it also gives you an incredible area of reverse command as the plane slows and the angle of attack increase, this is not something most light twin pilots are exposed to.
Here is the message, fly it like a turboprop or a jet and the plane will take care of you. Fly it like a piston twin and it can bite you. Therefore, if you want to fly an Aerostar, join AOA and get some training by an Aerostar specialist.
Tim