Since nobody else has chimed in on your post, I will offer up my thoughts on your questions.
"What I was hoping to do with this machine was to make a multi-purpose system though please tell me if I am mistaken about any of the table's potential abilities"
First off, combining a router and a plasma table is not an ideal combination. Plasma is a non contact operation that requires speed and acceleration more than torque, whereas routing is just the opposite. That fact makes it difficult to combine both operations into one machine. You end up with a machine that is mediocre at both jobs.
First I want to route plastic, foam, resin, wood etc with the router head, then be able to switch it out with a Hypertherm 65 to cut steel, aluminum and brass up to 1/4" or so, then maybe eventually try to add a laser to cut/engrave plastic, wood, and maybe even light marking on aluminum and brass, if possible.
My advice is to pick either a plasma or a router, whichever you want more and can make some money with. Build that and make the money to build a second machine for the other job.
I'm a little uncertain of the accuracy and capabilities of the machine, especially where the laser is concerned. Would I be able to mount a CO2 laser head directly to the Z-axis and use it just like the plasma cutter, or would I have to mount the laser in a stationary position and use mirrors? What wattage laser would I need to be able to do the things I described? I know the plastic and wood are easy, but it's a whole other animal when you introduce metal.
I dont mean to sound offensive, but this sounds like a pipe dream to me. While the Precision Plasma table you have shown as well as the electronics from CandCNC are both quality pieces, they are entry level machines. Though I have no first hand knowledge of lasers, I would imagine they are a fair step up the learning curve as well as the budget from entry level
The best advice I can give you, is to email Ron at Precision Plasma and Tom at CandCNC to discuss your plans with their products. They are both great guys that will tell you what is possible and what is not with their machines. They can also give you reccomendations as to how you should proceed with the budget you have.