We have regular reports and investor meetings so would have no troubles showing we are maintaining corporate formalities.

Each lot is zoned Single Family Residential.Here's my dilemma: I am considering whether I should formally combine these lots into one large parcel before selling, or if it's better to keep them as separate entities.

If you want to do partnerships please make sure you have a formal partnership agreement with one of two real exit strategies written into it that have been well thought out for what happens if one partner needs to sell his interest, if both partners want to sell, how you’re going to get it valued, just think about it.

IANAL but you will generally inherit the existing lease.At the very minimum you want to see a copy of that lease prior to releasing your inspection contingency, so you can ensure that it's a lease you can live with at least until it is up (make sure your seller/landlord didn't promise the tenant anything crazy that you are unwilling to live up to... the tenant isn't a "bad guy" here that deserves to be bait-and-switched on).Various things you could ask for on top of that if any spidey sense is tingling:Estoppel cert, either semi-formal (eg, something you write up and have the tenant sign) or formal and notarized (to 100% validate who actually signed the thing). https://en.wikipedia.org/wiki/Estoppel_certificate Proof of receipt of on time rent for 12 months, with it being reasonable for the seller to black out their account numbers and the like.

That would be formally a "Second" home type of scenario it sounds. 

The advantage of using a third party RUBS company such as Guardian or NWP instead of the owner doing it themselves is that each resident receives a formal utility bill in the mail each month with the provider's logo and1-800 call center number to answering any resident inquiries.  

The land contract is used so that if a seller sells with a small down payment, and carries back a note, he won’t have to go through a formal foreclosure in the event of default, which can be years in some judicial foreclosure states.

PA is a judicial foreclosure state. 

Lis Pendens are filed on non judicial foreclosures or show on title for other pending law suits.

I received formal training at a larger Google Ads agency and we also received training directly from Google Advisors.- Did you use a marketing agency?