How much to set aside for capex in a SDIRA

[Pearce G.]

If I own rental property in a SDIRA, and I have a major expense that exceeds the available cash and also exceeds the annual contribution limit, how do I pay for it?  Wouldn't it be a prohibited transaction and/or an unqualified contribution to pay for it personally?  Do I need to keep 15%-20% cash in the SDIRA to make sure I can cover a major repair?