Samthedog, you have a business decision to make here. I've had my own woodworking business and managed one for someone else. The machine looks substantial enough to do the work you want to sell to standards your customers will expect, but will it do it economically?
The machine you are looking at has capabilities in the shaper and mortiser that you say you don't need. If so, it would be bad business to pay for them. The seller will need to accept a lower price from you than he would get from someone who needs the whole machine.
More important, will the parts you don't need get in the way at all? If you plan on selling your time for doing value added machining in the wood industry, be aware it is a business with tight margins. You are building in a lower wage rate for yourself if the added equipment slows you down even in the least.
In my part of the world, the forest produces yellow birch which shows the flame figure you talk about. It's showy but difficult to surface. I think the Tersa insert heads are straight knife inserts. I would run some of the wood you plan to use part the cutterhead if you haven't already done that to make sure they will work well on the interlocked grain. People here prefer true spiral heads, spiral pattern insert heads, or (as a last resort) straight heads with a steeper cutting angle when surfacing woods with that type of grain to get acceptable yield without tearout.
Best of luck.
