The minimum amount for a single offer of Funding is $150 or the equivalent in other currencies.
For more information on Margin Funding, please view What is Margin Funding.
When using the Funding auto-renew feature, the minimum amount for one offer is a Funding wallet balance equivalent to $150 for the currency you will be providing. If activated, auto-renew will automatically offer the available funds in your Funding wallet.
If you have any inquiries, please feel free to contact Bitfinex Support. We are happy to help!