Hello and thanks for taking the time to read this. I need help deciding what GPS unit if any will do what I need. Part of my job requires me to walk around industrial parks, office buildings etc and inventory the storm drains, man-holes, utility boxes etc. Currently we just give a description of the location such as "Open Grate Storm Drain, South of BLDG 1". What I would like to do is carry a GPS and put a pin at each location. I would then hope to be able to upload this information in order to print a map and maybe label each spot. Location accuracy to within 20-30 feet is probably good. Price of under 0 if possible. I'm sure there are other specifics that would help but I cant think of anything else. Thanks again.