The size of a POR room is not much smaller than a WL one and given the fact you have double beds vs. queen beds, you might actually have a bit more room to walk around in!
If you cannot fit that ECCV in easily, talk to the front desk (don't call housekeeping, go and talk to them personally) and ask them to remove your table and chairs to make room for your ECCV. They are happy to do that for guests that need that room for their scooters. It would fit very nicely in that space. Although you might be able to just move the table over, closer to the tv stand/dresser and fit the
scooter in the space closer to the window.
I suggest Randy's Mobility, we used them a few years ago and they were wonderful!
My kids have stayed at the Poly, SSR, BWF, and OKW. We have done units as big as two bedrooms at those DVC's. All that said, they'd rather stay at POR than any of those. I am betting your kids will enjoy the resort, its nice and spread out with more pools than WL has and the food court is wonderful for families.
TV's aren't flat screen and frigs are free and standard in every room.