This is assuming there is not a ton of deferred maintanence on the building so definitely have a formal inspection and contractors walk it. 

This tenant then messaged me to request a formal signed letter if I refuse to let her install the product she wants to use.

My lease tells the tenant they should let me know if they are moving out at the end of the lease 60 days in advance, and that I intend to give them a formal 30 day notice to vacate the premises when we're 30 days from the end of the lease.

This mansion was formerly a formal Bed and Breakfast. it has the legitimate hotel fire protection devices and systems such as stairway lighting, pull down alarms and a full commerciall alarm system which are a bouns $40-50 k system not found in other places.

We still did formal background checks. 

Most learn and move on....and it gives my guy a chance to look around without a formal "mid-lease inspection".

Is there any other formal arrangement because the way you wrote it sounds like your wife and her father are 50/50

Hello,I am in the midst of a mortgage refinance and I am done with initial formalities, signing the initial disclosures and providing the documentation and so far happy with the terms and It can take 30-40 days to close from today.

They want to hear that they have the place and that it suits their needs at the price they think is Worthy. perhaps instead of a formal credit check, you should be using something like USA search to try to find potential problems.Originally posted by @Michael Ablan:Hey guys,Looking for advise.

Give them formal notice in writing that you are leaving (if you are month to month-do you still need 60 days' notice?).