The fermentation set-up is more important to making great beer. You can boil and ferment in any number of inexpensive alternatives that have little or no effect on the final outcome of your beer flavor. If your fermentation control is not good enough to target and hold a temp within 2 or 3 degrees, it can have a sizeable effect on the final product.
Now you mention you do not have full use of one of your arms. This can make a brewing setup with minimal lifting very attractive in your case. This may be the deciding factor in your case.
Another option might be to look at some options outside of Morebeer. Their gear is very good, but a lot of times you can find deals used on Craigslist, EBAY, HBT, etc from people upgrading or leaving the hobby that may allow you to do an upgrade in both of these areas for the same cost as buying a brand new upgrade in a single area. As some others have mentioned a used refrigerator, chest freezer, or even large coolers filled with water can provide fairly decent temperature control of a fermentation.