How can I buy more house with 5 free and clear rental properties?

[Sky Lin]

I live in Phoenix AZ. I bought 5 rental properties few years before when the market at bottom. I paid $40k for each. they are all free and clear now.  the comp show $100k average for each house. I rent it at $850 each. I quited my job since I bought the properties. last week,  I went to Wells Fargo to see if I can get some Line of Credit out to buy some more rental properties, but they said no to me. what should I do now? any opinion will be appreciate!

Thx