So there are so many software tools that it would be best you do a quick search.

List it on AirBNB and VRBO and use the built in tools.

ADUs seem to be really popular in California, depending on location. 

Grishma GovaniList of best real estate marketing tools from RE/MAX R4 convention

@Jesse Conrad Feel free to DM your email and I'll send you a copy - which also goes for any others interested in the tool. 

Or any specialized tools. 

A HELOC is not a great tool to use as a down payment on a long term hold, it is best used in quick turnaround scenarios.

This book is full of resources and education and if you order before 12/1 you get the best value because it includes ✅ Access to a live Q&A with James and gets his “The Flipping Workbook”✅ Sample Statement of Work✅Buy Box Worksheet✅James's Flipping Calculator✅Core Team Members Worksheet✅Tool Kit✅Glossary of Terms✅One person wins a giveaway: Free Pro Membership, All of Project RE content, Education, and Weekly calls with James & his communityOrder it paperback, hardback, audio, or ebook.

BP has some good tools to get you started here.  

Popular examples include Airbnb, Uber, and Buffer's early-stage pitch decks, available online for free.