There is part of me that sees the ROI and screams at you to take it, but there is a whole other side to the coin here. 

The unit I’m considering is a dated cash/coin operation and I’m wondering if that and other tweaks in service (subscriptions, etc) are a reliable way to increase profitability.

Reagan coined the term "trust but verify".

You're going to drop coin no matter which route you take.

My goal is to diversify (crypto, stocks, and real estate).  

Purchase price: $255,000 Cash invested: $66,000 This property brings added income with 3 bays of garage space rented separately, as well as coin op laundry What made you interested in investing in this type of deal?

We have a laundry room with coin operated washer and dryers.  

Thank you @Larry Fried - yes, after a little research today I don't think we'll go for the multifamily and looks like a turnkey co. in SFR is a better option.   

I cut my teeth in Lake co in the late 70 early 80's

I know that many of you might be snickering at what only a 16 year old kid can do, but I have the hunger of getting knowledge and coin.