PA doesn't even limit late fees by statue, but I suspect there are court cases on excessive fees that have set a precedent.

At this point; stage zero, I'm working on building my foundation to success.

Are you saying the 15% coc is after the refi stage of your BRRRR? 

I would also not charge for grease buildup on a stove unless it was so excessive that I had to chisel stuff off of it and it took me a long time to get clean.

I’m in the beginning/education stage of my real estate journey and looking for my first multi-family apartment deal.

Most people know that putting in hardwood/laminate flooring over carpets works out better, or that staging a house/professional photography is usually worth it.But for the BRRRR veterans out there, are there any little-known tips and tricks you've picked up along the way that others overlook or don't even know about that add value to your property?

I am more in the learning stage right now, and I am certainly not attached to any particular strategy, but I know that my goal is to match my current monthly income from passive sources.

Do you have professional pictures, curb appeal, staging, etc. 

Still waiting to hear backCommunication is really important at this stage of the game. 

Personally i think you'll make more in the long run and sleep better at night if you stage it and let them know your plans.