Why does the man postpone the project?

M: Hi, Ms. Long. This is Jacob from the landscaping company. I’m afraid we won’t be able to start working on your garden tomorrow. The weather report’s showing that there’ll be heavy rain.
W: Well, you know I’m going to be out of town for two weeks starting this Thursday. I wanted to give you a key to the gate, so you’d be able to keep working while I’m gone.
M: OK. Then what if I come by tomorrow anyway, just to pick up the key?
W: If you wouldn’t mind. I’ll be at home until ten-thirty in the morning.
50.Why does the man postpone the project?
51.What does the woman say she will do on Thursday?
52.Why does the woman say, "If you wouldn’t mind"?