I'm looking for clarification on Subject to. 

My understanding is that the interest can be deducted on taxes, if the cash out proceeds are used for improvements that increase the subject property value, however, if that is not the case, then the deduction can only be claimed on the original balance of the original mortgage used to acquire the property that is being refinanced.

For example, if an apartment complex is located in a college town and most tenants are college students, the building will most likely experience frequent tenant turnover.

Meet them at subject.

We want to make sure our partnership is concrete and leave no rock unturned.I know this has been posted a few times but in older posts it seems somewhat subjective.

If I were renting and had frequent rodent problems I'd be leaving when my lease ended, don't let these bad tenants drive away your good ones.  

I just finished "Rich Dad Poor Dad" and am wrapping up the BP "How to Invest in Real Estate the UBG to Getting Started," actively listen to the podcast, have David Greene's "Long Distance Real Estate Investing" cued for my next read, and look forward to becoming more educated on the subject!

Subject to3.

@Angela DingIt is frequently included in the listing and expected to be signed and returned with the offer.  

The tenants can stay in the unit for as long as they would like subject to an annual rent increase of 1.5% provided the owner exercises that right.