So take this with a grain of salt but if you're doing patch panel work you might not want to use a plasma (as desirable as they appear in videos, in person, and in mags). Plasma cut edges are contaminated and require cleaning (sanding/grinding) prior to welding or you'll get a porous/contaminated weld. Though I have a fairly nice plasma, I never use it for body work for this reason alone. My preference is the cut-off wheel because I can make square cuts that I can easily make filler pieces for and a cut-off wheel handles such a task easily.
If you really want a plasma, I'd recommend that you do some extensive research and not buy based on price but buy based on quality. I totally understand your question - fit it into your budget - but, from personal experience, I tried to do that years ago and ended up with a unit that chewed up consumables and didn't perform that well. Some friends pointed me in the right direction and I bought a hypertherm and have never been happier sense. Yes it costs more but, to be honest, sometimes the lower quality units end up costing you more in the long run.
My personal experience is with HTP (HTP America), ESAB, Miller, Thermo Dynamics, and Hypertherm spanning about 18 years. Of the units I've used and/or owned, Hypertherm won on all fronts (cut quality, consumable life, features, life of the machine, etc). I do realize that many of these companies have changed over the years and my experiences may not truly reflect the same test today with comparable units so take my experience with a grain of salt. Best bet is to ask questions regarding usage/experience with given units and manufacturers and then once you have enough info, make an educated guess from there.
If you're looking in that price range for a plasma I'd probably be searching pawn shops. I personally purchased a Drag Gun (Thermal Dynamics) at a pawn shop for less than $200 and used it for thin gauge materials for quite some time before I grew out of it. It worked great and fetched just a hair more when I let it go. Not sure what the odds are where you are but it may be worth checking unless you're in a hurry.
If these are the units you have to choose from, I'd probably pick the one sold by the company that will provide you with the best warranty service/return/repair and take into account consumable prices and availability. Consumable replacement is a part of life with a plasma and can eat your wallet if the machine goes through them quickly.
Good luck.