CNC band saw, FPM LED display

I am rebuilding a band saw, and will add an inverter drive
for the blade motor. One thing I want on it, is an LED display, most
likely 3 digit, to show Feet Per Minute blade speed (50-350FPM).
The gearbox input shaft turns 10 times per foot of blade travel.
Anyone know of a source for a low-cost display and appropriate
electronics (or a schematic to build same) that will count the input
shaft turns (divided by 10) using a prox sensor or similar?

I'd eventually like to automate it. Would appreciate any thoughts or
sources for "lower-cost" way to do this using a servo or closed loop
stepper. A membrane keypad and LCD display for programming (number of
pieces/length of piece) would be ideal (the 25 thousand dollar cnc
bandsaws all have this type of control).

Have a small cold saw I'd like to do same with. Could also be used in
wood shops, or anywhere a cut-to-length line is in use.

TIA

dan k