I've done deed searches and look at different documents filed.

Try reaching out to the Thornton Planning Department for any documentation they might have on file.Check Legal Precedents: Look for similar cases in your area.

All you can do now is take pics and document what she is doing.

Or you can sell it, split the equity, and go separate ways.I'm not a fan of borrowing from family/friends unless all parties are honest and everything is documented in a written contract.

I realize a lot has to be worked out, but tokenization through blockchain eliminates a lot of legal documentation issues once established.  

As with an STR, so long as you set and document clear expections, it is on the guest or tenant to proceed accordingly. 

https://www.biggerpockets.com/...12 Frequently Asked Questions (And Answers) About DSCR Loanshttps://www.biggerpockets.com/...8 More Commonly Asked Questions and Answers to DSCR Loanshttps://www.biggerpockets.com/blog/eight-questions-and-answe...What Documents Do You Need for a DSCR Loan?

In this case, a DSCR loan will be much better since you can do a cash out refinance with no seasoning requirement as long as you have documented rehab on the property.

Freddie allows for 12 months payments, Executed HUD, Wrap documents (note and dot), Executed Warranty Deed to offset the mortgage.

These softwares have a lot of functionality, but honestly there is a steep learning curve and the functionality is probably overkill for most rehabbers.FlipperForce - Web-based House Flipping Software built specifically for flipping & rehabbing houses w/ Estimating, Gantt Scheduling, Task Management & Budget ManagementGeneric Project Management SoftwaresThere are nearly an infinite amount of potential generic Project Management softwares available that provide powerful functionality for managing project schedules, tasks & documents.