You need to be equally focused on your expense profile equally to the attention you give to your income side calculations.There are plenty of calculators online where you can plug in your numbers to give you these metrics so you can always simply do your due diligence by requesting these figures from the previous owner and plug it into a calculator. 

what is 2% equal to?...

All banks are not equal on this topic.  

Fixed rate, low rate, longer amortization- all equal more money in your pocket.

Some people would recommend against your strategy, because they like to diversify their horizontal streams of income; investing equally in stocks and real estate for example.  

Investors will be investing in you and your ability equally as much as in the specific property.  

Illegal Lease Options - No rent credits, no maintenance paid by tenants, reasonable rent, reasonable sales price (I like "sales price will be equal to new appraisal at time of sale.")

But it gave us a separate suite as well as increased the capacity - equals more money!

You will find financing MOD's much more friendly over HUD homes due to appraisals and comps unless you're in a predominantly HUD MH environment i.e. an area where HUD MH's exist equal to or more than traditional site (stick) built homes.That stated, however, there's very little if any difference in the way they are built.

Are re-fi Rates for investment properties typically higher, lower, or equal to the rates for a typical purchase?