Have they mentioned what they might do or join in the future? 

For example, here in Boise a 4/2, 1800sqft+,3 car garage will offer the highest amount of market rent, is the most popular home to rent, highest quality tenants and they average staying there for 4+ years. 

You have to be quite selective and in some cases make some changes to the property to make it cashflow (ie add a garage, renovations etc).

This will enable them to manage a PM when they reach that level of doors.

When you are fixing and flipping a house is the garage door something that usually gets changed to a brand new garage door? 

To answer your question, I am a passive investor and probably will stick to the doors I have until the opportunity presents itself (probably won't happen since I'm very casually looking for it.)As far as 1st lien HELOC and investing goes,  it seems advantageous to me to have the option to reinvest from the LOC if the opportunity falls on my lap as opposed to having debt/equity tied into a conventional loan.

Now you will have four streams of income vs one, and the tax benefits/depreciation, cash flow, appreciation & debt pay down will all exponentially increase your net worth by having four doors vs one! 

We want to know exactly what interest rate we’ll pay on a mortgage, what the water bill will be, if the property next door is thinking of selling, and everything else that has even marginal relevance.  

The biggest impact will be interior paint, trim and doors, upgraded fixtures, bathrooms and kitchens. 

PS: not giving any of the check-in information until right before arrival helps avoid situations like this, where a new guest is beating on the door when someone else already has the right to be there until their check out time.