Nordelta to Pilar in the mornings should be a breeze as you'd be going against the traffic.
There are loads of new apartments in Bahia Grande next to the shopping center.
We asked about the ferries but I can't remember the details, although it is a regular service.
Pop over and have a word.
https://www.google.com/maps?q=nordelta+tigre&sll=37.06250000000001,-95.677068&sspn=57.94889164378686,96.35404905924051&t=m&dg=opt&z=15