The only reason I didn't suggest them putting the tree outdoors is because they live in an apartment and I'm not sure if they have an outdoor space.
^this.
We do not have an outdoor space that is our own, and as this is low income housing we don't trust the people, kids and adults alike, to leave it alone. The majority of people here just do not care about other people's property. An example would be that we had two poinsettia plants that I put out into the rain last week. Well, I came back and someone had kicked the one so that it was on it's side and one of the branches was broken.
Someday we'll be in a house, but we're waiting on Habitat for Humanity to open up applications. We have been waiting seven months, so hopefully it will be soon and then we just have to build our home on their timeline.
If the above style is out, is there anything that I can do with it style wise?
Well, if you really want to open your options up, try getting a grow light and really diving into this addictive hobby. A 4x4 foot T8 light will help this tree grow better than the window. You'll be able to choose from styles easier once the tree starts to grow.
I had discussed that with my wife and her answer was a firm no. To get going above and beyond putting it near a window is to much involvement and cost. To get its not a justifiable cost. It's kinda like me and reptiles. From the time that I was seven years old until I had to move back in with my parents at age 34 I had kept reptiles as pets. I met my wife and get back out of my parent's home and my wife has said absolutely no reptiles we come into our home.
Sadly, I am sick with what I got till we get ourselves a house where I can put it outside our at the very least get T8 light.
After all, happy wife happy life, right?
No reptiles? That's rough. I love my Beardie.
You never know, you may be meeting the environmental needs of your tree.
My Ficus retusa (from Walmart, no less) actually does better inside during the Winter with no special circumstance given to light (it's on the kitchen counter) than it did outside during the growing season. It may be due to the higher humidity inside than out. Plenty of new, healthy growth, without legginess.
Check your light levels. If you have a smart phone, download a light meter app. I've found that florescent and LED lights from a foot away put out around 14.4 lux, which is the same amount of light that penetrates the glass window at work, where I've had a Bougainvillea living. Your bright, direct light location may just be good enough.
That coupled with the fact that many windows, especially in warmer climates, have reflective and UV blockers built into the glass or film between glass panes.