I read this whole post...this is a good read.

Now from a yard point of view. Checks and or using paypal or bank wire is nice as you can easy track the money. Cash is a bit harder to track every last cent but easy to use, No computer is needed and being able to put cash into someones hand puts you on there good side right away.

P.s a well known trick..if someone only had a $100 load its best to hand them 20s and 10s than one 100 dollar bill..they see the more bills in there hand and feel like they got alot more than just one dollar bill that = the same amount.