For example, if a 1,600 sq ft main house is appraised at $100 sq/ft, what could I expect a 600 sq ft ADU of similar build quality to be appraised for?  

Purchase price: $212,000 Cash invested: $67,000 Great starter investment home. 70% ROI What made you interested in investing in this type of deal?

What I mean by that is a blanket loan is underwritten on all value of ALL the properties.

The brands I've been bid on have been:Eco WindowsCGI Sparta SeriesLawson IndustriesESWindowsAssuraAssura is from home depot, main advantage i've found is that they have a quick lead time of 4 weeks, compared to everyone else saying 6-8 weeks.CGI I heard its a reputable brand with a good warranty Lawson, cheapest quote but Im' hearing has a huge lead time now and they have been messing up peoples orders with sizes or specificationsES Windows, comes from Colombia and I heard spare parts, replacements and customer service is terribleEco, I haven't really heard much about but price seems close to what I'm being quoted for CGI Spartas Anybody on here with more experience that can help me narrow it down? 

(Approach - 2) - He says that if he is asked to pull permits, he is not responsible for any additional work that the inspector may throw (basically more money out of my pocket on the rehab costs).

If he can't help you, he can refer you to someone who can. 615-473-7509.

What to do with home worth$300,000?

@Sharad BoniRecommend exploring as many sources as possible to get referrals AND cross-reference them to get as much accurate information as possible.Check out NARPM.com, BP’s Property Manager Finder (BiggerPockets: The Real Estate Investing Social Network), etc.Also, encourage you to learn from the mistakes of others - by reading posts here on BiggerPockets about owners not having their expectations met by their current Property Management Company.

Start by reading the Ultimate Real Estate Investing Guide: https://www.biggerpockets.com/guides/ultimate-real-estate-investing-guide/introduction2.

I'm not sure what that is, but if what you're doing with the lender is not completely true, then you may be committing mortgage fraud which is punishable with jail and big fines.