Do I want to be aware of them if there are, yes absolutely! 

Tenant is aware or price adjustment and has agreed to it.

Let's say next year you do $100kIn April 2019 you will finally qualify for a loan and they will use the average of the two years, so your income would be $70kMost likely you will need to wait till April 2020 before you can use income that is closer to what you are actually producingSo if you have plans on acquiring properties, be aware of how a job change would affect that.  

It's a tough situation, and they should be made aware that you were "put" in this situation - but will work with them to "try" and make sure the sheriff doesn't get there unannounced.

I'll need to make sure the seller is aware of that.

Assuming that the perk test fails, is anyone aware of alternate septic systems allowed in PA and if so their approximate cost?

Account Closed, if you are aware of any that would possibly lend in my scenario, I would appreciate it greatly as well.

I'm sure you've squared away your 1099-MISC forms already and sent them out to whomever needs to receive them, but in case you like to wait to the last minute, be aware that for 2016 they may need to be filed as soon as Jan 31.  

If you are investing in a certain area, be aware of the rules, regulations and laws governing real estate in your area.  

You need to be aware of your Market.