How can we know if a corporate will renew their lease?

[Quang L.]

I am looking to buy a commercial building in Texas with several tenants and anchored by a corporate one. Their lease has 2 years remaning and several 5-years options. In short, if they renew 2 years from now then this is a good deal. If not, it can be a bad one as they accounted for 70% of income and building was designed for them with a drive through.
How can we know if theyy will renew? We can camp outside and count customers but any market intelligence services can provide that data?
Thanks in advance.