Maria's by the Sea is not far from TMM's base. A standard room, that sleeps for 4 is $130 per night, for 2 people. An extra $40 per person, plus a 7% tax and a random $25 extra per room, comes to about $250 per night for 4.

We prefer to sleep aboard, you can get settled into your rooms and familiarize yourselves with the boat. Talk to TMM and see if you can work out a better deal, especially having 2 boats, they might work with you.