I am purchasing an existing self service car wash that has magic spray pump stand and bay stations. The pump stand is in working condition but the bays will need to be upgraded with new bay stations, wands, brushes. My question is the although the pump stand is working it is 25+/- years old....am I asking for a lot of headaches if I continue to use it? Should I bite the bullet now and upgrade it all to new equipment? Trying to minimize money spent to get up and running but also don't want to be repairing equipment every day. Current owner claims system operates without much maintenance.