However you have not provided sufficient details.

You need to get a good paying job and after saving/working for two years if you have sufficient funds for a DP you then approach a bank for a loan.To be a investor you must have cash, employment and a high credit score.

New paint, possibly flooring, and a good cleaning will be sufficient.

I personally wouldn’t invest in RE until/unless you are debt free AND have sufficient cash reserves.

It's not easy to have those conversations but if you are fair, come in with data and are respectful of the tenants by providing them sufficient time to decide what they want to do, you are in a much better position to succeed. 

Is this sufficient to put into information for a Neighbor Letter?

I want to get to a point that I am comfortable with the units I have (i.e. they are the right ones, in the right quantity, and will provide sufficient income when paid off) then work on paying them off. 

If the repairs are of a quality to bring in sufficient rental income..

Given the very recent purchase, is it sufficient evidence to provide the final closing disclosure at the hearing?

Multis are incredibly rare with incredibly high demand, you just won't get an offer accepted being at that bog of a competitive disadvantage.Also with FHA, you wont find a 4 unit in the area that meets the FHA self sufficiency test if you use a low down payment on it.