Does my Son Need To Be Trained?

We are at a cross-road.  It is time to do shopping for the first Christmas Weapon X will appreciate (he will be 1.5 years old).  Our big plan was to buy a train table and train. <<train-table.jpg>> <<grandcentralstation.jpg>>

To make room, we need to sell the futon in the nursery.  Whaa?  Hold on a second!  I'm getting a little nervous about that.

We won't be able to have overnight guests if we sell the futon.  It also means Weapon X needs to sleep in his crib, which he most definitely does not do now.  The other option is to also sell the crib and replace it with a twin matress.  Then Mommy can still sleep with Weapon X.

The other option is for Weapon X to play with his train on the floor.  I found this nifty train play mat that zips up into a box.  www.zipbin.com

Should we make space for the table (which he will surely use for years to come) or should we go with the Zipbin?