I think you better to ask your broker. as my understanding, your bank has issued the loan based on your contract includes these three items. if you just remove these three items, the total contract value would be lower than the initial one you have presented to hte bank. Bank won't issue you same amount of money to a lower value contract.
我只能说,如果我是你,我会跟builder商量把你取消的那些继续完成,并以不完成银行就不给尾款这点来negotiate,我现在手上就这么多钱,你看如果能用这么些现金,把这些活儿都干了,那你也能多挣点钱,银行到时候也不会为难,大家都高兴。银行那边,可以试试看,但感觉基本希望不大。builder一般也比较忌讳handover之前别人进去干活,万一损坏什么东西了扯皮麻烦,他们还要给修,因为handover是有标准的,所以一般builder在handover之前不会允许别的人进去施工,owner想进去看看可以,想动手干活,no way