I just booked a daytime nanny at 2.5k. Uds that daytime confinement nanny is usually more ex than stay in as she needs to pay for rental herself. I think quite hard to find confinement nanny for less than 2k nowadays..
how about renting a room outside? If no choice need to stay with your step MIL, then maybe you just try to spend less time in the house and more time outside (maybe can patoh with your hubby) before your BTO comes. Or simply just stay in the room unless u want to go toilet.