I think I have it. Yes, tabs could be the answer... unless this is getting too crazy.
So, on the front page I will use an image to say "showroom" and make the alt text = "zero turn mowers".
Then, beneath that main category I will also include: edgers, blowers, etc... as if they are sub categories (but in reality it will all be links to the 2nd layer if you know what I'm saying).
So, basically I will have a page that is optimized for zero turn mowers with this content:
/zero-turn-mowers
ZERO TURN MOWERS (h1)
TORO ZERO TURN MOWERS (1st tab & h2)
Description
Toro Zero Turn Homeowner (1st inner tab &h3)
Mower 1
Mower 2
etc...
Toro Zero Turn Commercial (2nd inner tab & h3)
Mower 1
Mower 2
etc...
GRAVELY ZERO TURN MOWERS (2nd tab and h2)
[same structure as Toro]
/edgers
[repeat structure for edgers 1 page]
Although, it is probably too ambitious to go after "zero turn mowers"... I wonder if this double tab structure is bad on page optimization or excellent as this is going to cause me to have a ton of content on each page.