Promises are amazing.

Loan.destroy({ id: id })
                .then(function(result){
                    return LoanInvestor.find({loan: id})
                        .then(function(loanInvestors){
                            return loanInvestors.map(function(investor){
                                return investor.id;
                            });
                        });
                })
                .then( function(LoanInvestorIds){
                    return [
                        LoanSchedule.destroy({loan: id}),
                        LoanInvestor.destroy({loan: id}),
                        LoanInvestorSchedule.destroy({loanInvestor: LoanInvestorIds}),
                        LoanNote.destroy({loan: id}),
                        LoanDocument.destroy({loan: id}),
                        LoanTransaction.destroy({loan: id})
                    ];
                })
                .spread( function(schedule, investor, investorSchedule, note, docs, transactions) {
                    return result;
                })
                .then( function(result){
                    Loan.subscribe(req.socket, id, ['destroy']);
                    Loan.publishDestroy(id);
                    res.json('Deleted Loan');
                }).error( function(err){
                    res.json(409, err);
                });