I’ve read quite a few posts about foreign investor financing but most seem to deal with non-citizen investors without US credit or personal tax filings.

When you pay cash for a $400,000 home and rent it out, your rate of return will likely be less than 6%.You could invest in stocks and earn 7% or better.You could put the money in a high-interest savings account and earn up to 5%.I don't understand why anyone would pay cash for real estate, erasing many benefits that increase the rate of return, while exposing themselves to the risk of loss (turnover costs, bad tenants, capex, etc.). 

Any good recommendations for the collection agency or any way to get the money back from the tenant or any way to report it to the credit bureau?

Two things are certain, 1) taxes are lower today than they've ever been in the past 80 years. 2) they are certain to be higher in the future.We should all be focused on paying the lowest “lifetime tax bill” not the “lowest tax bill this year”.By paying 20% and settling up my long-term capital gains is not a bad deal.

INstead of just saying "no" we asked them to check with their credit card company if they offer travel insurance yada yada.. we got a 5 star review form them without giving a refund.

Andrey this the same deal you were posting about a few months back.. if so i would contact Kathy and see whats up.. its exactly as i thought it was.. seller financing so the debt was to the seller who then probably sold the notes to other investors.. so no recourse just bad deal 

US credit (some lenders may require 1 or 2 credit scores to qualify you).

As always, some bad actors cause burdensome regulations for everyone else.Per the Akron Cleveland Association of Realtors:"For example, in Cleveland, a local agent in charge must be identified if the property is not owner-occupied.

What's the lowest credit score you will allow?

This video is a great start and includes a lot of sample images (good and bad).