Yoga is one of the best forms of exercise if you're short on space or don't want to invest in lots of equipment. And the equipment you do need - think yoga mat, yoga brick (for balance), a blanket or cushion (for comfort) and resistant bands - won't break the bank.
Perfect your warrior pose and relax into downward dog with yoga clothes that move with your body. You'll want a soft yet supportive sports bra and stretchy yoga pants that help your skin breathe in case you want to turn it up a notch. A loose vest to throw on and grippy socks are helpful extras.