I don't understand how you can't track them down.You could stop paying HOA dues, and that will force them to contact you.As for the PM, I would instruct them to hold off on painting until the termite issue is resolved, which includes providing you with contact information of the HOA board.

So long story short I don't think it's likely they'll come back and check on your property to make sure you're not renting prior to sprinkler installation, but they can if they want to and if they find renters they can permanently pull your permit.

Approach them now about doing it, provide them the proper forms, and instructions on how to do it. 

Now, if the deal is so sweet that someone may want to step into your shoes prior to closing for a large fee, make the contract including the seller financing terms freely assignable and ironclad.Good luck.

Quote from @Bhushan Shinkre: Few corrections, tenant simply decided not to pay rent and took further action of asking for refund of all prior payments (legally made via Baselane), which Baselane paid out no questions asked.

If you don't want them in your property, you don't have to renew the lease.Reason for non-renewal: habitual late payments.Don't know Maryland's laws, but make sure you have prior documentation for notices given to them for the late payment.

They are unable to visit the units prior to signing a lease.

I could have bought it and arranged to upgrade the panel on Day 1 after we closed but I didn’t feel good enough about taking the risk on a $280,000 deal in the event there was a problem and I had to try to make a claim prior to the repair.

One month prior to this, their water bill was abnormally high.

People will come and go, make sure you get all keys back prior to them leaving.