If you bought right and only made the necessary repairs, you should be able to pull out all or most of your money.

Duplex's, triplex's and 4plex's are not commercial apartment buildings.They are bought, sold and valued the same as SFH residential properties.

Also be cognizant that the majority of tax liens are bought by large firms with wall st $ that they get cheap thus can bid them down.

Any extra advice from people who have bought this way in Pennsylvania and especially Montgomery county would be appreciated!

I have 1 rental property that i bought, renovated and rented. 

If she bought it before the marriage then it would be different.

In discussions with him, I mentioned that if I bought it, I would hire a property manager.

I do have a “safety” stockpile account where I store money for these purposes: taxes, returned security deposits, etc.I have a w-2 job and am having taxes taken out for that.

The 7-unit I bought as a value-add property and added about $100k in equity over the last year, so I'm not opposed to doing similar projects in the future if profitable.I know how to analyze a deal and calculate NOI when scouting properties (though admittedly these properties were acquired many years ago, before I knew much about RE investing).  

We have an "accidental" rental house in rural Missouri that was originally bought as a primary residence and taught us all about what doesn't make a rental house profitable, so that is the extent of our experience so far.