This is a great forum with very knowledgeable members that will help to guide you in the right direction.I really like the alerts feature that can quickly guide you to current topics that may be of interest: http://www.biggerpockets.com/alertsThere are a few self-contained guides that you can access here: https://www.biggerpockets.com/guides

We'll be renting the main house out when we move and the house tenants will NOT have access to the detached garage. 

They should also have all access to any permits, and will be able to help guide you on the rezoning for the ADU property.

They likely have access to a database of standard statewide rental forms.

Cap rates are tough because they can vary sometimes even block by block.

A lot of us have focused on Philly in the past year because the deals are better comparatively and the options are pretty vast to house hack there or invest in multi if you understand the city dynamics and blocks.

I'm always keeping an eye around there for something distressed but I'm still a ways off from that area being accessible to me.

I’ve decided to bite the bullet and build a house on the land to more easily access the equity.

You will access to 80% of that equity and you get to keep the house.

@Ralph FrancoisWell you get access to equity via a HELOC or a cash out refinance.