I was wondering if anyone had any recommendations on how to calculate a relatively accurate 5 year rent growth for a market?

In any case, you can easily calculate that.Looking at your objective of retiring in Costa Rica, you have two options:1.

I think I have calculated the appropriate numbers, but this our first new-build adventure and I would appreciate more experienced eyes on this analysis.We are considering purchasing land in Packwood, WA and building an upscale modern 3/2 1500 sq ft A-Frame cabin.

If you find someone giving you confused looks, seek a mortgage broker that helps investors.I'm not so sure how they would calculate income from short-term rentals.  

There is only risk/profit exposure calculous.

Quote from @Robert Quiroz: Quote from @Rick Albert: You have to keep in mind there is a calculation when it comes to increasing rents.On my last tenants of three years, I only increased once.

Don't be discouraged but rather see opportunity and calculated risks. 

Sterling,Each lender is different on how they calculate income and also what overlays they have that can cause a bad income calc. 

We already paid them a pretty sizeable entry fee ($30k) to cover some of their equity and debt in another project..Your title report should have alerted you to the issue.The payoff the escrow company got from the lender should have alerted you to the problem.Your interview of the seller before you bought the house, should have alerted you to the problem.You calculations on the numbers should have alerted you to the problem.Check, cross check and check again.

Then you can pretty easily calculate what the holding costs of that home will be and when you'll have to replace those systems.