(Same accronym ADU) Info on actual Govt sites will be more trust worthy (though also not always 100% accurate, Montgomery County's site leaves off a lot of the requirements for ADU's on their checklist, like ceiling height)Loudon County looks like it requires a lot size of 5 acres to have them. 

Some wholesalers...can be less than trustworthy.

In my experience, I've found it a much better and easier experience to work with those who are trustworthy and upfront versus those who are not. 

Just ask there and that will give you HUNDREDS of responses.Now, as a 15 year, out-of-state investor my recommendation is to ALWAYS choose whatever city you have the most trustworthy contacts in.  

If you have a trustworthy reputable Rental Management Company you’d recommend I would appreciate that.

I'm not working that angle now, but its always in the back of my head, as I get to know more and more people and they know that I make my living investing in real estate, that I know what I'm doing, I'm an honest and trustworthy guy, etc.

If you weren't going to run  it yourself, you would need a very trustworthy manager.  

I called several PM's and could not find any under 30-35%, so unless you are super familiar with the town rules and regulations, have a rock solid trustworthy housekeeping crew and local handyman to fix things (most HK's won't even change a light bulb for you, or batteries, so you need a handyman or PM type person), I don't see how you can make a profit unless you self manage.

I just purchased my first properties in Baltimore and I need to find reliable, trustworthy property management.

I figured the person was trustworthy since he was well known and making the rounds at nationwide REIA meetings in the early 2000s.