Maneuvering a bent - bike OR trike, to your apartment may be a problem. Especially if you want a trike. The cash flow and weight issues will only make your quest harder. Maybe one of the Sun bikes, such as the EZ-Classic or the EZ Sport will 'fit the bill,' especially if you can find a used one. Before you buy anything, you might need to make a cardboard cutout to see if you can get one around all the corners.

I hat to say it, but a bent might NOT be do-able, mostly due to the circuitous path in and out of your apartment. If the bent plan is going to be too hard to implement, you might also look at bikes like the Electra Townie as a near-bent option.