If they are keeping the place clean, paying consistently, and trying to make it work, I would return the favor and try to be flexible if possible. 

The key that I found was to change my cancellation policy to the most flexible option.

Are there lenders that would be more flexible regarding this?

Don't box yourself into a prison, stay flexible. 

This is why the infamous BRRRR method works so well with 1031 investors who want to also be active buying and rehabbing.Entity creation when contemplating 1031s takes some careful thought so you keep the greatest flexibility and avoid tying  to together with your partners.

For all readers, we do plan to stick with the original agreement, however, would be flexible time wise to meeting the seller somewhere in the middle.

I could help in a number of ways, here are just a few: I have a flexible day job in which I can do 2-3 hours per week in middle of day to help with day to day real estate activities, take calls or whatever.Experience with building websites, SEO, social media & marketingI'm a productivity/time management nerd - I can help with business processes or help with organization.

A simple solution is to divide ownership of the exiting S-Corp however then we are still left with all the assets held in an S-Corp which to my understanding is not as flexible as ownership in an LLC.

Asset-based loans are faster, more flexible, and less docs (i.e. no tax returns, no pay stubs, etc), but at a higher cost.  

A house I would be interested in, a seller who is motivated, a ballpark range on the acquisition costs, a willingness to be flexible on their expected fee, then we can finalize all the details.