I've determined my qualifiers are: -Once my business can support taking my current salary +20% out every month. 

I suggest you to network around, and find one that is able to support you and your goals. 

Apply the 40% rule, which I totally made up myself a few years ago.

Just using the "50%" rule, you can expect to continue to pay around $1250 per month on average over the life of the property in those types of expenses. 

However, the numbers are as follows and any input would be greatly appreciated:Asking price-$270,000Unit A Rent-1400Unit B Rent-900 (10+ year renters)PROPERTY APPRAISAL-$260,000THIS DOESNT MEET THE 1% RULE, BUT WOULD WITH UNIT B AT MARKET.THANKS GUYS!

The insurance underwriting companies sometimes have rules flat against it. 

If you look at the 2008-2009 downturn, it was one of the best performing asset classes so that supports it's recession resistance.

(Currently, there is no minimum number of days you have to live there for it to be considered your primary residence.)Require evidence of neighbor support or at least proof of notification of neighbors.

Also, are there other liens which can cloud title such as judgements, IRS, child support, installment loans, etc.

My wife makes enough money to support us without a house payment and gets insurance through her job so that should make this dream a bit more realistic.