Imputed interest is an IRS regulation that charges interest (at a fluctuating rate) and taxes you on it when you are not charging interest.  

As long as you are ok with the cashflow and it fits in your criteria then the fluctuations in price shouldn't be your main concern.

I have been using $45 per sqft. for a ruff estimate, but now I see that number can fluctuate drastically, based on condition of the house and scope of work, etc... 

A 5% return is not overly aggressive and assuming I am earning more than I need that number can fluctuate without effecting my standard of living.I personally only need a conservative 2M which I already have.

The numbers are so vague coz our currency ex rate is fluctuating tremendously lately.Prop2 - i will finish paying for it by the year end and put 5-7k into finishing it.

So far, I've seen fluctuations between $30 to $300 per pick up of an 8-yard dumpster.

In my opinion, cash flow per door can fluctuate greatly by market and can be a bad indicator.

The market is very steady with not much fluctuations.

I understand $/Cap rate but how does that factor VIA interest rates which can fluctuate from investor to investor? 

Anyone out there with experience using foreign private money, for example AUD, and how you handled the risk of currency fluctuation?