I've found regional credit unions to be a good place for flexible terms and reasonable rates.

Jerry was very flexible in terms of making changes as the project moved forward as well as providing his expertise in both design decisions and offering me multiple solutions to any issues that came up.The project soon expanded into a whole-house remodel.

https://www.biggerpockets.com/...The strategy of flexible payments in this article intrigued me.

Hit the gym to build muscle, flexibility, and stamina.

Private lenders can be very flexible and accommodating depending on the relationship and the property. 

The HELOC just gives you flexibility and more control of your cash.

Banks will be a cheaper option, but may be less flexible than a private or hard money lender.Best,Michael

Hard money and private money are more flexible bit equity driven. 

I recommend you give her several days notice and a couple options so she has flexibility in case there's a legitimate excuse.

One would recommend being a bit flexible with tenants who have been there for years since they are good payment tenants.