Pick holder has got it spot on !
I operated loads of pinballs back when they were popular in the 90s. At the time because of gambling regulations you could only operate them on a rental (we charged £25 / week + vat for a new machine) which guaranteed an income unless the site decided not to pay

.
I had the same idea recently & thought that pinball might once again be lucrative ?
The first was a lethal weapon to replace a quiz machine ! It went into a nightclub & took around £100 for 8 weeks. It’s been there for about two years & we haven’t been near it for around 6 months, but still not expecting to get much from it. (But it’s a convenient store at the moment). There have been no service calls with it !
I put a fish tales onto a site on 50/50 share. The first month it took £100 in total then by the 6th month it was taking about £25. There was only one service call with a flipper spring breaking. The owner Refurbished his lounge & decided that the customers didn’t like the clunking & threw it out !
Tried a corvette next ! It went into a spare space in a pub ! It lasted about 3 months. Took about a tenner a month as the older customers didn’t like the clunking noise & it was mostly switched off. It should have been out earlier as customers complained to owner that the machine was in a space where they liked to sit

! The only service call was to repair the engine block which wouldn’t shake (resistors on engine pcb under play field had dropped off)
The next one was a ghostbusters premium. It went into a busy city center student orientated Pub which was open from 11.00 until 01.00 the next day ! (Retirement here we go

). The machine was in a premium position next to the bar ! (I can imagine the cash rolling in

). Emptied it after 8 weeks & it took about £40

. Found out that it wasn’t taking coins & that there was a £2 coin jammed exiting the coin mech as the coin path on the bracket was blocked with a piece of plastic which wouldn’t let the coin through ! (Manufacturing fault). It lasted on the site for around a year & took an average £35 / month

(found out that it was mostly the managers wee boy who played it). Service calls were a jammed Coin & dead machine (their faulty extension cable) !
We put a tracker into the ghostbusters costing around £50 including a years tracking & sim data as it was a lot of machine to lose if someone decided to walk in & take it (especially with the head bolts on the outside now

) it also sent data as to when the machine was switched on / off ! It did sometimes send false data but worth it for peace of mind !
Personally I wouldn’t bother doing it again as the return is not worth the hassle. Eg, by the time you move it, set it up, repair it, insure it, get **** from the publican, change it, remove it etc. There’s nothing worse than trying to repair a flipper or board fault in a busy pub on a Saturday night with drunken engineers (every pub has one !) giving you advice !!
You also should have public liability insurance to operate just in case the machine injures someone or damages something !
My advice, Buy yourself some digital Jukeboxes & operate them instead, better return, less hassle but obviously not so much fun !!
I hope that helps a little & Good luck with whatever you decide to do