Renovating a house with a baby and a SK

My husband is renovating the whole floor downstairs which will be our main kitchen, dining and living room. He's gonna hire someone for the job but in order to save some money he has to do some plumbing and electricity by himself. It's his house but I'm gonna partecipate by paying half of the renovation. We have an ours baby (almost 4 months), who's on sleep regression and EBF. And he has a daughter 3,5 years old, who's nice but as a toddler she needs a lot of attention too. We have her 50/50, the whole week starting from Monday. Now, he's pressuring me that he needs to advance in the house works every weekend, so when he has her too, meaning I need to watch her. I really can't do that physically and mentally. She talks loud and I need to correct her behaviour all the time. I have no energy for this on top of the baby who lately has become a velcro baby. He doesn't understand that I get No Break at all. This evening I was so overwhelmed, our baby was having some tummy ache, the toddler with all her questions,and I just went in the bedroom to decompress a bit. He came to tell me to stop my depression and come and help clean the living room. He never even suggests for me to take a break and do something for myself. Has anyone been in a similar situation? Do you have any advice? (We have no family close by to help us)