If it's really important to you, you'll make time. Wake up at 9 instead of 11. Go to bed earlier to compensate. You may feel like you're "missing out" on something else that you do regularly 'till 2 A.M. every night, but EVERYONE who works out has to subtract that time from their free time. You DO have time, you're just likely spending on less beneficial things.
Now, a poster above suggested a set of adjustable dumbells and a pullup bar. That's good. I recommend the
iron gym for a doorway mounted pullup bar. For dumbells I personally prefer the
dumbell handles that you add weight plates to to increase the resistance rather than the adjustable type that usually don't come in high weights for reasonable prices. You have to swap out the weight manually on the regular dumbell handles, but you get the luxury of being able to buy weight as you need it when your strength increases over time. I also recommend getting a stable bench on which to perform your exercises.