@Joshua Thompson already linked the long post that I wrote to answer your question:https://www.biggerpockets.com/forums/51/topics/1215989-expla...Based on your subsequent comments, you missed the point of my post: it DOES NOT matter whether your accountant holds a CPA or an EA designation (or neither of those two).

My goals would be to increase monthly cash flow and have more access to the property's equity for things like Cap Ex, etc....Here's a blurb from a lender's website:"By combining banking functionality with home financing into one dynamic instrument, borrowers are able to save tens of thousands of dollars and years off their loan""Designed after popular programs around the world, the All In One First Lien HELOC is the nation’s first transactional offset type-mortgage program.Home financing and banking combined:Deposits lower your loan’s principalFunds remain available for expensesInterest is calculated on the average daily balanceThis lowers the monthly interest paymentsTens of thousands of dollars can be saved over the life of the loanMortgage freedom can be achieved in half the time or less

I am under contract on a lake front house but still in the due diligence period - I just learned that it's designated flood zone A.

It is more of an accounting platform designed for real estate than a management platform.For my STR company I use hospitable and clearing.co for my management and accounting platforms.

The project required rezoning and platting before we got to design.

Adding rooms does create the potential for more conflict but carefully thought-out floorplans, designate wet and dry storage spaces, and provide supplies.

I understand home designs are pretty expensive, and cannot just be applied to any lot/existing neighborhood.

You are designing a logo2.)

The extra cabinets I needed in order to complete the design ended up costing $2,000.

That same renovation now costs $100,000 with added permitting/design expenses and lengthier permitting timelines.