Home Reno question

I’ve got until 9/15 in my rental and wondering how long I’d need to potentially extend the lease for….

How long would it take if I buy an existing 4000ish square foot house (ranch) with a loggia and enclose that to turn it into a kitchen and turn the existing kitchen into a bedroom/bathroom en-suite. Would also be demoing and redoing the floors throughout as well as the existing 3 bathrooms. I’d like to hire a quality company to design/build who does beautiful work in the shortest timeline as possible. I don’t need stuff imported or anything super fancy like that and can pick semi custom kind of stuff.

Thank u!