Once you get it, look up the process for filing a temporary restraining order against that person / those persons, and do it. 

I'd be alright with a $4k security deposit and only do 1 month's rent personally, but the fact that they're haggling with you about it would be a red flag for me. 

Personally I would rather buy a rental property over a personal residence because I want something that can potentially give me cash flow every single month over a liability.

It could be that the property had the lower level finished since the last appraisal was done, but the only way to get this confirmed is to have a licensed appraiser go out and assess the property in person.

Hello Arnold, I personally used my 401k to buy my home back in 2017 so I know from experience its a pretty easy process.

I would let them know that you have documented proof that they screwed up, and if they won't waive the fees then you will make it your personal mission in life to leave a negative review (with proof) on any website that allows reviews. 

If you are given a personal guarantee, that is different.

@Christopher Lynch Personally my top three areas would be the North Conway area, Lincoln Area, and Gilford area. 

I am willing to give the person who goes to the property commission if and when the deal actually closes.

Long story short, I have 3 properties in my own personal name: Small multi-family properties (a 4 unit and detached garage bank, another 4 unit, and a 3 unit) that I had residential HELOCs on in the second position, with a fixed residential in the first position.