| If your blood sugar is dropping like that, it means you are getting too much insulin. Cutting down too much will cause ketones, but what the safe amount of basal is, is the amount that you have good blood sugars at. If your blood sugars are in range, it means you are getting proper amounts of insulin, and shouldn't get ketones (at least not from that). I doubt ketones will be a problem, especially if you take decent meal boluses. You can try testing for ketones a few times, and if it is a problem, making try 2 doses a day again, but smaller amounts.
I didn't use any basal for about 2 months when I was first diagnosed, but I was honeymooning and my need for basal hit like a ton of bricks. | 
