I wouldn't want to discourage anyone from putting machines out on site as the more the better, but it can take up a lot of your time. So my first recommendation would be to keep any site as local as possible, you will have to go out and fix faults, release stuck balls and coin mech jams. One way to keep this to a minimum is to site your best condition machines, but this goes against most peoples natural desire. I have all but given up putting 90's bally williams games out due to the amount of service g they need. You can shop a machine out, put on new parts, but the wood that they are attached to will still be old and worn, so targets come loose (air/trapped balls) etc. Also the boards and displays don't kope with just being turned on all day every day (LED's help a lot!) So I tend to use Stern machines for the most part. Also, the takings will look great after 2 weeks and you will be thinking 'I should've done this ages ago' but they do drop off pretty quickly and you either have to accept the poorer returns or rotate games regularly. Another point is that not all sites work, I have put machines in a few working mans/social clubs and they made no money at all! So the right site is important. The other thing I would recommend is lock bars, pinball doors are a doddle to break Into (as I saw on CCTV recently) and having a machine damaged and ripped off at the same time sucks! However, if you can get the right site and maintain the machines so that they play well, then you will see a return, it won't make you rich, but it can be worth while.