Do you plan to use the 3rd bay in the garage for every day parking or is it more for storage or for a car with more occasional use? If the latter you could consider doing a tandem garage on one side. If you want a front facing garage I would try to set it back some so it isn't the thing you see sticking out first. Although frankly when you are on wider lots or acreage you often see the side facing garage just as much if not even more than the front facing ones so I don't think in those cases that a side facing does nearly the same for a house as it does on a narrower lot, where it doesn't become as visible from the street. Our neighborhood have many side facing garages including ours, and I see those garages and sides of houses a whole lot more than I see the front of the houses as I'm driving by or even as I'm out running I see the sides more than the front. I actually wish I had thought about that and changed it to a front facing that was set back a little instead as it would have worked better with house access from the drive way etc. Only the houses that are placed along a curved part of the road do I see less of the garage. One has it on the side, but in the way back and still attached and that one you do see a little less of it than the majority that have them to the front side.

You also might want to check with your insurance company to see if you can leave your property and or car unattended for more that 30 days. As far as the car goes. Leave it alone. 60 days won't cause any problems. If the battery is dead when you come back it was no good anyway. I've left batteries unattended for a year and they were fine. I have a vehicle that has gas in it from 1992. Still runs.The smell is pretty bad but it does run.

I think it depends on the angle of approach and size of the cars. A "double wide" is always easier and I have seen the results a few times of the miscalculation. So it is a balance of aesthetics, cost and function. Nothing unusual there. Front of house may argue for single doors more but who has a 3 car garage on the front. We copied a house that was on a corner lot and had 3 singles. There was a discussion about looks but cost won out. If you do decide on the double wide, then you have to then decide where to put the double - we went with closer to the entrance door since we knew that the double would be used more. That wasn't a universal decision in our neighborhood but it made sense to us. BTW - no trucks/SUVs here - with a nice wide driveway but just yesterday, someone was parked in the drive and my wife never would have made it out with a single door.

Not all new construction homes in Arizona are built with side entry doors anymore. I don't quite understand it and seems like a potential fire trap. What if the garage caught fire with someone in it and the door entering the house was locked? Sure, you might be able to remotely open the overhead if you could find the remote in time or manually pull it open, but how long could that take? Not everyone is capable of lifting up those heavy doors. I see many homes in the community where I live that don't have side doors. Buyers usually don't notice until they move in and go to take the trash out (usually through the garage).