Tomorrow will be another day for the kids, they rationalize, but a business deal or a professional achievement, if not capitalized on at the moment, may evaporate.
( ( ( ( ( ( Tomorrow ( will ( be ( ( another day ) ( for ( the kids ) ) ) ) ) ) ( , ( they rationalize ) ) ) , ) but ) ( ( ( ( a ( business deal ) ) or ) ( a ( professional achievement ) ) ) ( , ( ( if ( not ( capitalized ( on ( at ( the moment ) ) ) ) ) ) ( , ( may evaporate ) ) ) ) ) ) . )
(ROOT (S (S (S (NP (NNP Tomorrow)) (VP (MD will) (VP (VB be) (NP (NP (DT another) (NN day)) (PP (IN for) (NP (DT the) (NNS kids))))))) (, ,) (NP (PRP they)) (VP (VB rationalize))) (, ,) (CC but) (S (NP (NP (DT a) (NN business) (NN deal)) (CC or) (NP (DT a) (JJ professional) (NN achievement))) (, ,) (SBAR (IN if) (S (RB not) (ADJP (JJ capitalized) (PP (IN on) (PP (IN at) (NP (DT the) (NN moment))))))) (, ,) (VP (MD may) (VP (VB evaporate)))) (. .)))
They quit their jobs because they know their time with their children is limited. 
( They ( ( ( quit ( their jobs ) ) ( because ( they ( know ( ( ( their time ) ( with ( their children ) ) ) ( is limited ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP They)) (VP (VBD quit) (NP (PRP$ their) (NNS jobs)) (SBAR (IN because) (S (NP (PRP they)) (VP (VBP know) (SBAR (S (NP (NP (PRP$ their) (NN time)) (PP (IN with) (NP (PRP$ their) (NNS children)))) (VP (VBZ is) (ADJP (JJ limited))))))))) (. .)))