Just wondering if there's a quick and reliable online vendor, or should I just take my RE broker's advice (I trust her) and use her "guy" (she's never done home equity through him, to me it just sounds like another person who needs to take a cut)? 

Your basic problem is not your fees it is that you have lax business practices that have trained your tenants it is OK to pay late.

Nearby detractions - train tracks, gun clubs, busy roads, airports, garbage dumps, etc.2.

Treat this as a normal business transaction, do not even consider this as being family.As for the interest/principal calculation's there are numerious calculators on line.

Buy a rekey kit from Change-a-Lock or Primeline, available online or at home centers.

What are the preferred methods of online lein searching?

The good news is it’s simple math and online deal analysis and calculations make the math much easier and with a greater degree of accuracy

Tl/dr: we are looking for advice/resources to help "train" our newly inherited tenants to be more financially literate/stable (more context below). 

I read online that a rent increase of 10% or more requires a 60-day written notice.

I don't normally like to talk about what I do to the online world but I stumbled upon this sub-forum and I figured this would be as good a place as any to talk about my plan.