Way better than asking a bunch of strangers on the internet.

I know this is broad so let me explain: I am looking at SFR (house or townhouse) in the Baltimore County, Anne Arundel County area under the $100k range.

I've scoured the internet and come up empty. 

You can do two things here — take your chances with the free forms that are abundant on the internet or hire a real estate attorney, in your state, to draft the documents you need.

Balance: $76,5006.5% interest, includes PMIBalloon payment at the end of 2 years:$74,000If 10 year fixed: $869 a monthIf 15 year fixed: $660 a monthIf 20 year fixed: $570 a monthIf 25 year fixed: $517 a monthIf 30 year fixed: $484 a month$600 average for homeowner's insurance, property taxes, gas, electric, water, sewer, garbage pickup, basic cable TV, digital phone, and Internet.1 bedroom rented for $450 a month.

It seems like a lot of work but, in the Internet Age today, the information is at the tip of your fingers.

In my opinion: (non legal just the ramblings of some dolt on the internet)If you felt the need to purchase a decibel meter, set it up, listen to the neighbors and record the results.

Is any references on Internet for him?

I would recommend spending some time doing some serious internet sleuthing. 

A national bank or a lender that has a brick and mortar representatives in WA would be great, but an internet lender or remote credit union is fine.