Having used many organizational systems over the years, the best advice I can give is, use whatever format/system seems most accessible/usable to your own brain, whether that's a spreadsheet with 10 tabs, your phone's contact list, or a simple piece of paper.As far as spreadsheets for property financials and mortgages, I'd recommend you look at some samples online (there are plenty), research the concepts involved (e.g., google how do I calculate net operating income), and then make your own spreadsheet.

The website is sweepstrategies.com    I am not recommending them, but it is an interesting concept about mortgage financing in the United States.      

So you're basically against the concept in general, not just for this property?

Edward,There is no such thing as "No Comps".

If they have not held a property 10, 15 + years they have no true concept of cash flow.

However, we soon realized that as big as our family is we're not using the property to its full capacity so that's when our daughter, who is also our property manager with with our long term rent/least portfolio, introduced the idea of the vacation rental concept.

Many of the concepts are quite relatable given my experience as a mortgage lender, buy & hold and flip / JV investor. 

What I found helped me accelerate quickly was learning management skills along with real estate tools (concepts of buy and hold, notes, flips, lease options, etc.).

The handyman ad hoc concept is fine, until no one can reach the handyman - or that handyman injures himself on the job....or worse yet....the work that handyman does injures your tenants.  

You need a lawyer to sort this out for you.. and not the ones who are doing your current LLC work, if they agreed with you to do this without explaining the limited liability protection concept.. they are a bad lawyer.