100k not enough.

any meaningful lawsuit can easily wipe out the coverage and you be standing naked.

I usually recommend each SHF or duplex, carry 500k(minimum 300k), plus a minimum of 1mil umbrella.

as to larger MFU complex, should carry a 2mil(1mil occurrence, 2 mil aggregate) minimum liability policy, or better, 4mil(2mil occurrence, 4 mil aggregate).