Michael,   A good book to purchase is "Professional Real Estate Development: The ULI guide to Business.   

Put drain tiles along the hillside so water doesn’t erode all the way down.

Those of us who have build investment assets, businesses, professional practices, etc. understand how much time, effort, planning and capital it takes to “scale”.  

HI,I was curious to hear from other professionals, when you have a tenant for a couple of years, and then he wants to add a new person to the lease, what steps would you take?

If additional funds are required or if a professional is unable to resolve the issue, Lula will reach out to you directly.Let me know if you have any questions! 

Definitely not what I would expect from someone who is a professional.

This deal taught me the importance of overestimating rehab costs and always having a solid team of professionals on How did you find this deal and how did you negotiate it?

You're still leveraging his network/connections/professional experience.

The extra income is not worth the disruption to our neighbors.Did you work with any real estate professionals (agents, lenders, etc.) that you'd recommend to others?

It keeps things professional while giving you room to grow your expertise.I admire your perspective on keeping your parents’ resources separate from your own—it’s smart to want to succeed on your own terms.