The summer heat is on, gym memberships can be pricey and according to a recent study, more than half of Americans say they'd rather exercise at home anyway. We challenged Julie Labrum to help us build a home gym on a serious budget. Labrum has beet a fitness instructor for more than 20 years. She said all it takes is a few smart, versatile pieces of equipment and you can build an effective home gym for as little as $50.