Those are very close.Assessments do take the condition of the building into consideration, but they are broken into two parts - building, which can fluctuate with condition and land which doesn't.As to older properties, I'm selling one for a client now and rehabbing one of my own.The one I'm selling is a genuine antique, built in 1814.

Market fluctuations is precisely the topic I am interested in studying.

That way your cashflow won't fluctuate based on the mortgage.And as for rates going up or down in 5-15 years, I don't plan that far ahead.

Thanks @Nate Reed for explaining.As a primary buy&hold investor, with passive income as the goal, I come from a different perspective:- The property appreciation is not something you can rely on, as nobody can predict the market fluctuations and time the market.

And I am assuming your in the 90% of investors that is just looking to be a landlord.were you have to be more cognizant of market trends is what we do.. value add building new construction land development ext.. those are much more risky in fluctuating market.for us we are gung ho on 2018 and probably most of 2019... sales are brisk in Portland prices up 20% from last year and sales are steaming.. but that's more of a business not just buy and hold.I have personally been in this game for 42 years continually and have bought, sold, rented, loaned money and cut timber in every year .. 

The tool does factor in the # of people the property can sleep which will generally fluctuate the nightly rate and overall projection.

SLC seems to be isolated from the fluctuations of the rest of the country. 

Interest rates fluctuate as they are a larger part of the financial markets. 

i generally stear clear of coops because there are too many unknowns. strenuous screening for all tenants, high fluctuating maintenance fees, some don't let tenants in at all. and just because others do, doesn't mean they wont give you an incredibly hard time when you try to go through the process.

So, if your HELOC is like those that I have, you have a "draw period" during which the monthly payment is interest only (IO) with the interest rate fluctuating based on some market index; at the end of the "draw period" the HELOC will no longer be IO - it will change to being fully amortized based on the outstanding balance left at the end of the draw period.