As a small business owner also more than 5 decades in the trade, I am well aware of the "Natural Selection" and the accelerated "Survival of the Fittest" happening in our rapidly changing and shrinking industry.
My point is that smaller shops wishing to modernize may sometimes find themselves mercilessly exploited by their vendors.
The need of vendors to maximize profits, causes them to use tactics of concealing extra/hidden costs and further down the road - wishing to kill their customers' older, still good and well functioning equipment.
These tactics may prove detrimental to smaller, less informed, unsuspecting shops.
So my strong advice is to try and limit exposure to possibly predatory tactics by carefully examining all alternative, less costly and thus less dangerous options.
Staying safe may well be worth some extra labor...