Strip about a foot of edge preferably at a corner and work out the time required to do all the edges by hand.
Corners and edges can be the most built up areas.
Coating should only take an hour or two depending on size of floor.
If it just needs a light cut back and over coat - happy days.
Stripping will be messy, require masking, machine clean up, pads, additional rinsing.
(Your Hourly Rate x Time) + Materials + Profit = unit price.
m2