First off thanks everyone for your help... I apologize I know a lot of this has been discussed here before and I read through all of the threads and some of them are a little outdated so just have a few specifics.
My travel is planned as follows...
Chose to fly Lima-Tacna roundtrip with Peruvian Airlines which ended up being $53 more than taking the bus, return flight next day (this is my first time so don't want to be rushed)
1. Does anyone know or suggest a place to stay overnight in Arica?
2. Finding good colectivos at airport, any suggestions?
3. I have overstayed my tourists visa and the last topic I read was really unclear and seemed like there was confusion on where to pay. Any advice?
Any other points, advice, etc feel free I would appreciate it. Hopefully everything will go smooth and upon return I'll share my experience.