I agree with Bert, Jimme, Dave and everybody. Double entry is not an issue. I wouldn't even bother with an interface with PM.
I am a new user with AC but has been eyeing this product for more than 5-7 years (and it quadrupled in price!). It is not even close to being perfect (and I do not know of any) but the simplicity is the key to this software.
I can understand each provider needing to buy a separate license, but would expect that all providers in the same group would share the same database. Isn't that correct? Jimme are you suggesting otherwise in your post?