Sounds like a bit of a roller coaster ride.

@Mike Milano The question is not about the safety of application, the question behind the question is: will this primer "seal in place" the lead paint without any EPA violation against the lead being friable, also will it not disturb that lead paint/chip when it is applied, I know for a fact that rollers and paint brushes can chip out paint especially when epoxy or even simply paint is applied, there is a viscosity factor when you start applying it, therefore if you have a chipped paint and you roll it with something viscous, then you are potentially spreading the lead based paint.

I offer the home to the park owner, at a fair price, and they tell me they have first right of refusal and are now going to skate around me and buy the home directly from the people that I have under contract!!!!

and don't buy roller covers made for smooth walls.

Absolutely. for dog pee--Pull up the carpet, pour it out 1-2 of cups kilz at a time, use a roller on a long pole, bare feet or flip-flops.

I've had the property rented out for 1 year now and that alone has been a roller coaster ride! 

If it hasn't been painted before then the popcorn will come off on a roller really bad.

I think it's been a pretty big roller coaster ride out there for the last few years.

What a roller coaster of a year for you. 

FYI, depending on the type of roller you use to paint, you may have an orange peel effect anyways.