Tenant Fit Out--Who should pay?

[Greg L.]

I'm in the process of purchasing a six unit mixed use building that has 3 commercial spots.  I expect the tenants to be the smaller businesses like insurance agents, delis, telephone/ipad repair shops and etc.  I also expect that that I'll have gross leases with these guys.  In this situation, who does the fit out and what determines who does it?  I'd prefer to have the tenant handle that.  Demising walls are up and major systems are in place, so we're talking about internal walls.