No affect at all on your personal credit, so as long as you didn't give them a social.
However, based on how your biz is set up, your lender could look deep into your biz. I had a friend who bought a home for the first time a few years ago. He had to submit personal and biz financials for his incorporated LLC. He had been in business less than two years at that point so all of his credit was new too.
Now that I dwell on this, it doesn't matter on the structure. I saw my dad-in-law go through this 10 yrs ago with his 20-yr old S-Corp.
DnB lists when the TLs were opened, but I don't think there would be any issues with their age, so as long as they are all paid on time.