@Manuel4579 Hmmm. Owns own company and asking for a discount. It’s too bad your initial response wasn’t to say, “no can do.” Well, now you can say it! As @Anonymous say, “a major red flag!” So, no, don't give him your number or allow him to see your place. Matter-of-fact, If it were me, I would probably report him for asking for my number.
Another thought—your place is huge. and very nice. Why does a traveling contractor needs this much space unless other workers are traveling with him. Just food for thought.