This is completely different to renting the property before you buy it. A lot of new builds are either rent or part rent/part buy but what she is wanted to do isn't either of these. She wants to rent it for a short term before she completes. This is outside a standard short hold tenancy type arrangement.If it’s a new new build I think you can.
I’m sure I’ve seen some can be rented some part exchange and some rent to buy.
I highly doubt they will let her she has said she wants to buy.
She could go lodge with her dad for a bit and rent storage for her crap. With all her decluttering she shouldn’t have a lot and I bet it would still be cheaper then renting. Plus then she can have Xmas with her dad.
Everyone’s a winner
Also how Did she have cookies in the oven if it’s broken? Or has it been fixed?
Her dad probably doesn't want them with him, after all the moaning she does you'd think he would have offered if he could. Yes I think the oven is back on.