Through my cabinet-shop connections, I managed a snappy deal ($200) on a used cabinet saw with a 54-in. commercial rip fence. That price would be hard to match, but it is possible to find a hybrid or used cabinet saw with a high-quality fence for $600 to $1,200. Some of them will run on 120v household current, meaning you won’t have to rewire your shop for 240v service, but be sure to check for compatibility before you buy.
Often times at first glance a board looks straight and the fact that it is actually bowed or has some warping isn’t always obvious. So the trick to knowing for sure, is to hold the board up towards your face, with the other end on the ground, and look at it at a downward angle (as shown in the below photo). This method will allow you to see if it is bowing at all.
I added an accessory mitre gauge to the saw for accurate cut-off work. The Incra Miter1000 showed up under the Christmas tree after the Lee Valley flyer photo with part number mysteriously ended up on the fridge door with a circle around it last December. A great addition, the Incra is light, accurate, and provides adjustable stops for cutting multiple parts to precise length. I will also make a plywood cut-off sled for the saw for squaring larger panels.