My deceased husband had our home loan i was on survivor ship deed only, and i made the pmts on the home for almost 3 yrs and the bank wanted me to fill out an application to finance the home into my name since my husband did a loan modification and he was no longer here to sign the final paperwork.

Is there a difference in creating a note and modification of a note?  

I suppose rent could be increased to account for the higher utility bills, but in general is there a general clause in a lease that you normally put in to disallow things such as the window air conditioner or other modifications to the unit.

Give your parents the respect they deserve and be a good landlord regardless of who is living in your units.Also, some good points made by @Michele Fischer, as you may want to invest in modifications to make the unit more accessible for your parents as they age.

I sent out a list of 1000 yellow letters about a month ago and I am preparing to send another list soon, however I am not entirely sure about some modifications to the list.

Looking for some feedback on structuring a partnership.I have a multi-use property under contract for $400,000 that will rent for $3,200 / month.I have fronted $3,000 of earnest money and will put my commission from the sale toward some modifications that will allow it to rent at $3,200.

If I'm the note buyer (in this example) then I could do what's called a loan modification with this person and agree to take past due amount and move it to the back of the loan, restructure payments so that current owner of condo can afford it.  

She was never late, but the mortgage payment was high for her, so she has now done a modification using the FHA-HAMP program to lower the mortgage payment while she is ramping up income (having been a stay at home mom for the last 15 years).  

Just document the modification and get a signature.

Unbeknownst to my mom, my grandmother refinanced the house twice then did a modification, we now owe much more on the house than we bought it for, however the home still has equity.