24 months of rent in reserve?

[Mark Walker]

My mother (retired) owns 2 condos and her own home free and clear. She went to Wells Fargo to take LOCs on the 2 condos to access the equity to buy another unit and was told they would do 60% LTV. Now Wells Fargo wants to see verification of assets equaling 24 months of RENT payments on the two condos. This seems insane. She has close to that amount in various bank accounts but not quite and this is holding things up.
Is 24 months of rent in reserve reasonable?  If not, how can she argue the amount down with WF?  What's a better way (apart from WF)?